Hey, guys , Need a little information.....

[WP29440SE]

Hey guys,

I bought a 1977 cast crank truck/RV 440 , and after getting it home i discovered the 3 and 4 rod journals are trashed and the crank can not be turned. i have a nice 74 passenger car cast crank coming in the mail.

what are the differences between these two cranks. is it that the truck crank is drilled for a 4 speed?

can i use my original cast balancer on the new cast crank with no issues?

i appreciate any and all info you can provide !

as always, thank you in advance !

 

[Cranky]

It may or may not be drilled for a stick. I forget what year but somewhere in the mid 70's, they went with a different thrust bearing that has a larger flange or faces but the smaller bearing can be used on the later cranks. And yes, you should be able to use your cast balancer but I still like to throw them up on a balance machine anyways. The factory balance wasn't that great and you never know if the pistons or rods in the other engine were heavier or not.

 

[WP29440SE]

It may or may not be drilled for a stick. I forget what year but somewhere in the mid 70's, they went with a different thrust bearing that has a larger flange or faces but the smaller bearing can be used on the later cranks. And yes, you should be able to use your cast balancer but I still like to throw them up on a balance machine anyways. The factory balance wasn't that great and you never know if the pistons or rods in the other engine were heavier or not.

Thanks Cranky, i am going to mic the new crank when it gets here and get the appropriate bearings for it. do you know if there are weight differences between the stock rods (1851535) and the LY rods? i know its not a good idea to mix and match them , but can these be used together, or are all 1851535 and LY rods the same? if not , what are the differences?

 

[moparmarks]

440 cast should not be drill for a pilot bushing beings how all factory 440 4-spds had a steel crank.
The truck motor probably has the heavy 6-pack rods.

 

[Cranky]

I've had 4 speed trucks with the cast crank before....

 

[WP29440SE]

440 cast should not be drill for a pilot bushing beings how all factory 440 4-spds had a steel crank.
The truck motor probably has the heavy 6-pack rods.

how would i identify whats what? here is the numbers on one of the rods. kind of hard to read , my camera is lame

 

[moparmarks]

I've had 4 speed trucks with the cast crank before....

You have? Mine all had steel ones. Same with my 400 4-spds.

 

[WP29440SE]

here is the back of the crank, it doesnt appear to be drilled

 

[moparmarks]

Nope not drilled.

- - - Updated - - -

I have a fresh cast crank turned .010 that I don't think I'll ever use.

 

[WP29440SE]

Nope not drilled.

- - - Updated - - -

I have a fresh cast crank turned .010 that I don't think I'll ever use.

thank you , but i have a crank in the mail , any idea with the numbers on the rod? i cant seem to find any info on them , darnit LOL

 

[Cranky]

thank you , but i have a crank in the mail , any idea with the numbers on the rod? i cant seem to find any info on them , darnit LOL

How wide is the beam at the pin. The big rods will be right at 1 1/4" wide and 9/16ths thick. Stock passenger car rods will have an LY on them...

 

[WP29440SE]

the beam is right at 1" x 9/16 below the wrist pin. the center of the beam is 1 1/8 if that helps.

 

[WP29440SE]

any one know if these rods are the same as the LY rods?

 

[Sixer]

Note the number forged into the rod, and the LY code-you have LY rods. Here's a guide for ya's

[SIZE=+2]RODS[/SIZE]

Rods Forging #	Engine	Application
1737 692	383 B	58-71
1737 692	400	72-78
1851 535	383 / 426 (RB)	59-65 (Standard)
1851 535	440	66-79 (Except 70- 72 HP)
1737 642	350 (Forged) 361 (Forged) 383 (Forged	58 (Car) 58-61 (Car) 59-61 (Car)
1851 127	413 (Forged)	59-64 (Car)
1851 436	413 (Forged)	60-77 (Truck with 8-bolt crank)
1855 527	383 (Forged)	59-61 (Car)
1978 698	RB (Forged)	59-61 (Car)
2203 155	B (Forged)	59-61 (Car)
2206 157	361 (Forged)	60-78 (Truck with 8-bolt crank
2206 158	440 (Forged) 413 (Forged) 426 (Forged)	66-72 (Car), 71-77 (Truck) 62-65 (Car) 63-65 (Car)
2206 159	400 (Forged) 383 (Forged) 361 (Forged)	71-72 (Car), 72 (Truck) 62-71 (Car), 67-71 (Truck) 62-66 (Car), 72-78 (Truck)
2206 160	440 (Forged) 413 (Forged) 426 (Forged)	66-78 (Car), 70-80 (Truck) 62-65 (Car) 63-66 (Car)
2402 330	426 (Forged)	63-64 Max Wedge
2463 548	426 (Forged)	64 Max Wedge, 8-bolt crank
3462 923	383 (Cast) 400 (Cast)	69-71 2bbl 71-78 (Car), 73-79 (Truck)
3751 877	400 (Cast)	73-78 (Car), 73-79 (Truck)
3751 888	440 (Cast)	73-78 (Car)
4027 172	400 (Cast)	73-78 (Car)
4027 175	440 (Cast)	73-78 (Car), 73-79 (Truck)

 

[WP29440SE]

Thank you Sixer, thats exactly what i needed to know , you rock man !~