How much power?
 

Ok guys I have the 383 in my car. It will be dyno tuned in the next few days. Mods are as follows, 383, Mallet Cars fully ported LS6 heads, Comp 921 springs and hardened push rods, Brute Speed forced induction cam, Fast 90/90, TSP 1 7/8 headers, TSP True Duals, Performabuilt Level 2 tranny and Performabuilt 3500 stall, Racetronix pump and hotwire and 60lb injectors. Car still has stock 10 bolt rear with 323 gear. Will be upgrading to a 12 bolt next. Now I know autos don't dyno well. This motor is set up for boost and I will be putting a ProCharger on next year. But what do you guys think it will make right now? Guess away.:D

I'll say you'll pick up 60 rwhp with our cam on your for now N/A motor.

Take a look at the info I have at this link regarding 12 bolts.
https://www.brutespeed.com/rear_end_information.htm Bob

Well i can tell you that 10 bolt isnt going to last too long on the street or strip. You also dont see a ton of power loss from the T56 to the 4L60 maybe 3-4% more at the most. I would say around 430-450 running a FI cam with lower compression.

Bob you didn't make a guess.:jest:

I would be very happy with 450. Not sure it will make quite that but I sure would be happy if it did. But I am far more concerned with how it runs at the track anyway.

I hate guessing, too many variables with dynos, etc. Bob