Ballpark estimate for the cost to do a 5.7 Hemi swap in a '70 Charger

[furious70]

A turbocharged 383 is fun. It's not cheap or simple tho. But rewarding.
392 cam in a 5.7 changes it's attitude some

 

[Kern Dog]

I like the stock hood and have no interest in anything sticking out of it or a scoop on top of it.
I wouldn't mind a stroked 400 but I'm not aiming for the ultimate with this car, just a level of satisfaction that is probably just a few small moves from here. I built this 383 myself. The decks were squared and surfaced to have the pistons .005 below deck. The cam is the MP 280/474, not too wild. Yeah, it was just installed without being degreed. The heads are

The '346 heads were milled and cc'd to 84ccs so they had been milled a couple times before.
It isn't as if the car is a slug, it will peel out in a straight line and runs great, its just lacking the torque that the other cars have. The shorter stroke is probably at least partially responsible.

 

[furious70]

A modern cam and some TF or stealth heads would make you happy

 

[Kern Dog]

I was unaware of the costs to do a 3G Hemi swap until a few days ago. It was like the guy that looks outside, sees that it is sunny and steps out for a moment not knowing how damned hot it is.....then turns around and goes back inside.

 

[icetech]

stock converter?

 

[Kern Dog]

No, it is an 11” that was built by Lenny at UCC for approximately 2800 stall but that was behind the 440/493. I used the trans and converter from the red car when I swapped a 5 speed in it.

Maybe it does stall too low for a 383. Good point.

 

[Photon440]

Man, I've forgotten all the numbers......but a 400 block and 440 crank makes 451 iirc. That's also a good combo. Don't know about the 383 combos since the bore is smaller as I like big bore engines.

383 bore may be smaller, but 4.25" is still pretty good, it's the same as a Chev 427.

 

[icetech]

No, it is an 11” that was built by Lenny at UCC for approximately 2800 stall but that was behind the 440/493. I used the trans and converter from the red car when I swapped a 5 speed in it.

View attachment 1764643

Maybe it does stall too low for a 383. Good point.

yeah, if i understand properly lower torque will make the converter not flash as high? so that could be a lot lower than 2800... is it doggy all around or just from a stop?

 

[Kern Dog]

Once I'm up to speed, it picks up nicely. It was first put on the road with a 3.23 and ugh...it felt way too slow. I have a 3.91 in it now and while it is better, it still lacks the snap of the Dart or other Charger.
I have another factory "Hi-Stall" that I got some time ago. I had it gone through at a converter shop in town. I could swap it in in half a day and know if it helps.

 

[icetech]

Once I'm up to speed, it picks up nicely. It was first put on the road with a 3.23 and ugh...it felt way too slow. I have a 3.91 in it now and while it is better, it still lacks the snap of the Dart or other Charger.
I have another factory "Hi-Stall" that I got some time ago. I had it gone through at a converter shop in town. I could swap it in in half a day and know if it helps.

couldn't hurt... with 3.91s i would think that thing would be zippy.. i never used that cam though.. my 400 had a .484 in it and LOVED that cam

 

[Kern Dog]

I had this same spec cam in my first 440 in the red car. It would spin the peg leg single tire all the way to where I got tired of peeling out and just let off the gas and let the tire hook up. With a 3.91 SG in it, it ran a 14.01 at 101 with a crappy 2.40 60 ft time. Zero traction but once it hooked up, it ran strong.