That's going to depend on how you finish it off with intake, and headers, etc. But I rather doubt anything near that power and torque level. Especially if compression is down that low and those are stock unported heads. Think more like 350/400 (at the crank . . . maybe). I've seen this happen in person at dynos. Guys with good ole big blocks in street cars (not like Ron's Chevelle), finished off rather nicely, get a little disheartened when they discover their power to the wheels is in the low 300s at best.

Now let's see what the guys who know what they're talking about say. :)

Depending on the heads and compression I would would guess around 350-400hp and 500-530tq.

I'm thinking around the same as you except I think it will have 500tq. By the way your right about the Chevelle. When I took it to have it dyno'd to check the AFR Steve told me that he thought it would put down around 350rwhp. He was really surprised when it put down 460rwhp.

Do you mean at the flywheel or to the wheels?

I forget BB torque is so stout.

At the flywheel.

I've had several SBFs with 112 LSA and they really had very little lope, if any. The 429 is going to smooth out that idle much more than the SBFs I've had. You really won't get any lope, IMHO.

Edit: I see this has already been covered. Just disregard what I said.

"you kind of pushed him over the edge and is not seriously looking into it"

So now it's my fault?????:leaving:

A stock 429 in a 1970 Mach 1 made 370 bhp and 450 lbs-ft of torque. They were 11.3:1 compression.

1970 had 11 to 1 compression. Same as my 70 T-bird. Stock HP is 360 with 485 ft lbs of torque.:bigthumbsup:

My 429 runs great on 91 octane. The bigger the cam the better the 11.1 works.


A cam with .050 duration of about 235 degrees is a good start for the 429. Try to keep the lift down for a street engine. Guide wear is bad with a very high lift cam.:bigthumbsup:

Were those stock heads worth a poop?