'72 RV 413 engine questions

[SublimeSixpack]

Not B-body related, but I'm looking for info. on what crank and rods a 1972 RV 413 engine would have come with from the factory. I can pick this 35,000 mile engine up for little money. I haven't looked at it yet but the photo I saw shows it to be complete. Any info. would be appreciated.
I do know about the heads, intake, water pump and such on these engines but not the crank and rods.

 

[Glenwood]

Not B-body related, but I'm looking for info. on what crank and rods a 1972 RV 413 engine would have come with from the factory. I can pick this 35,000 mile engine up for little money. I haven't looked at it yet but the photo I saw shows it to be complete. Any info. would be appreciated.
I do know about the heads, intake, water pump and such on these engines but not the crank and rods.

My 73 413 had ly rods, forged crank and thick cylinder walls. I had it machined to 4.25" with lots to spare. Custom pistons are pricey though!

 

[SublimeSixpack]

My 73 413 had ly rods, forged crank and thick cylinder walls. I had it machined to 4.25" with lots to spare. Custom pistons are pricey though!

View attachment 409973 View attachment 409974

Thanks for the response. Is your '73 413 an RV engine, or an Industrial engine?

 

[Glenwood]

Thanks for the response. Is your '73 413 an RV engine, or an Industrial engine?

I don't know the history but it had little wear and is supposed to have a high nickel content. It does have extra water jacket passages for typical rv heads though and a 6 bolt crank.

 

[SublimeSixpack]

I don't know the history but it had little wear and is supposed to have a high nickel content. It does have extra water jacket passages for typical rv heads though and a 6 bolt crank.

Thanks, I may go look at this one. I'd hate to see it go for scrap.

 

[mopar 3 B]

Not all rv 413 had standard or normal bolt threaded cranks. Be careful.

 

[SublimeSixpack]

Not all rv 413 had standard or normal bolt threaded cranks. Be careful.

Yes, I'll check that out.

 

[Cornpatch MO]

Yes, I'll check that out.

The crank, block and rods are good stuff. The pistons, heads and water pump is scrap.........................MO

 

[SublimeSixpack]

The crank, block and rods are good stuff. The pistons, heads and water pump is scrap.........................MO

Thanks, that's what I figured.

 

[SublimeSixpack]

One other question are the RV 413 push rods the same as regular 440 push rods?

 

[HT413]

My '72 413 also came with LY rods and forged crank. Hughes has pistons for the 413, std bore and overbore as well I believe.

I dunno, man, if you were going to run it as is (with better heads, etc) I'd say go for it. But if you're going to rebuild, by time you're done you'll have same or even less into a 440. What you spend in 440 block will be saved in pistons. Heck, on a budget, good used aftermarket 440 pistons are everywhere. Use that savings to justify the 440 block.

And think about resale value - for same $$, a 440 adds tremendous value and is something to brag about, whereas an RV 413 hurts value and will take some 'splaining.

In that regard, don't over pay - that motor's value is soley in the forged crank, as ly's can be had for next to nothing and everything else is junk.

 

[SublimeSixpack]

My '72 413 also came with LY rods and forged crank. Hughes has pistons for the 413, std bore and overbore as well I believe.

I dunno, man, if you were going to run it as is (with better heads, etc) I'd say go for it. But if you're going to rebuild, by time you're done you'll have same or even less into a 440. What you spend in 440 block will be saved in pistons. Heck, on a budget, good used aftermarket 440 pistons are everywhere. Use that savings to justify the 440 block.

And think about resale value - for same $$, a 440 adds tremendous value and is something to brag about, whereas an RV 413 hurts value and will take some 'splaining.

In that regard, don't over pay - that motor's value is soley in the forged crank, as ly's can be had for next to nothing and everything else is junk.

Your points are all well taken, I understand the draw backs and lack of appeal of the RV 413. I was just wondering if the push rods (not con rods) were the same as the 440.
I have several parts for big block mopars that I can use on this 413 if I pick it up. It would be something I'd do just for the fun of it and to save an old Mopar engine. If the short block is in very good condition (and should be with only 35k miles on it), with some closed chamber heads installed, and with other parts I already have this could be a good engine for a pick up, or a fun engine for something like a rat rod. Just trying to figure if it's worth my time and effort.

 

[Garys1969RR]

You know, I had an old 413 with Arias dome pistons, and ported 915 heads in a 65 Belvedere. That thing ran consistent low 12s all day long, with a Holley 780 atop a Tarantula intake! So they can be made to perform well. Bump the C/Ratio up for some added power. I was at 13 to 1! And if you already have alot of parts, I'd say go for it. I have some ported 906 heads with larger valves, 2.14/1.81 that would fit on your 413. And the 440 they came off of was running great! PM me if interested.

 

[SublimeSixpack]

You know, I had an old 413 with Arias dome pistons, and ported 915 heads in a 65 Belvedere. That thing ran consistent low 12s all day long, with a Holley 780 atop a Tarantula intake! So they can be made to perform well. Bump the C/Ratio up for some added power. I was at 13 to 1! And if you already have alot of parts, I'd say go for it. I have some ported 906 heads with larger valves, 2.14/1.81 that would fit on your 413. And the 440 they came off of was running great! PM me if interested.

Thanks for the info. Gary, and the offer of the 906 heads but I already have a few pair of heads.

 

[HT413]

Sounds like a good project.

My old 413 was just about 7:1 even, but with some mildly ported 906's rpm intake and what I'm pretty sure was a 268 cam, it went pretty good. Good enough to roast a pair of Sportsmans. I used to pull the back seat of my 69 belvedere and load the trunk with 800lbs of wood pellet bags, some 2x4's, whatever project I was doing. That motor never noticed. Nice thing about those RV motors.

No idea on the pushrods, but theyre cheap enough either way. Heck I have the set off that 413 I'd be willing to give ya if you cover the ride.

 

[SublimeSixpack]

Sounds like a good project.

My old 413 was just about 7:1 even, but with some mildly ported 906's rpm intake and what I'm pretty sure was a 268 cam, I went pretty good. Good enough to roast a pair of Sportsmans. I used to pull the back seat of my 69 belvedere and load the trunk with 800lbs of wood pellet bags, some 2x4's, whatever project I was doing. That motor never noticed. Nice thing about those RV motors.

No idea on the pushrods, but theyre cheap enough either way. Heck I have the set off that 413 I'd be willing to give ya if you cover the ride.

Thanks for the offer. But when I researched the RV 413's oddities, one was that the 413 push rods are shorter than the other RB block push rods. And if I installed different heads such as 516's or 915's as planned I'd need the longer push rods. (Although I probably have the ones I need stashed somewhere). The whole thought behind doing this 413 was a very low buck build but when I add everything up I'm sure I wouldn't be able to get my time and money back out of it when I sold it. Might just as well invest the money into something I'd use like the 400 block and 440 crank I have waiting to become a 451. I think I'll pass on this 413, but I do appreciate all the input! Thanks guys.

 

[Glenwood]

You know, I had an old 413 with Arias dome pistons, and ported 915 heads in a 65 Belvedere. That thing ran consistent low 12s all day long, with a Holley 780 atop a Tarantula intake! So they can be made to perform well. Bump the C/Ratio up for some added power. I was at 13 to 1! And if you already have alot of parts, I'd say go for it. I have some ported 906 heads with larger valves, 2.14/1.81 that would fit on your 413. And the 440 they came off of was running great! PM me if interested.

Would heads with larger valves on a 413 have some clearance issues? The max wedge engines with larger valves were notched I believe.

 

[mopar 3 B]

Bore is less than 4" I think. Valve clearance on 383 with 4.25" can be a problem with the wrong heads.

 

[62 Dart Convertible]

Bore is less than 4" I think. Valve clearance on 383 with 4.25" can be a problem with the wrong heads.

413 std bore = 4.18"
426 std bore = 4.25"
440 std bore = 4.34"

Max Wedge blocks were notched to clear 1.88" exhaust valve

 

[Garys1969RR]

Would heads with larger valves on a 413 have some clearance issues? The max wedge engines with larger valves were notched I believe.

My 413 had the stock 2.08/1.74 valves that came in the 915 head. Highest lift cam I ever used was a Racer Brown mushroom lifter cam with .690" max lift. I believe the 413 block had a .060 Overbore, making it in reality a 426. Bore size of 4.25", same as a stock 383. I never had any valve to cyl bore clearance problems, although I do recall grinding a small area at the top of the block to help airflow into the cylinder.