Hey all,,, I recently acquired a 383 stroker to go in my Hot rod and it is supposed to have 11.5:1 ratio compression,,,, from what I understand it's not a good idea to run pump gas with the compression that high on steel heads,,, it is a running motor and I don't want to tear it down unless I have to but I'm okay with doing that,,,
I'd like to lower the compression to 10:1 and run normal pump gas without octane booster.
So any input on how to build a 383 with the existing parts I have now and what would need to be changed is greatly appreciated,

Here's what I can tell you about the motor,,,, if you need more let me know and I'll do my best to get it.

Good ole 10/20 block,

Scat crank with I believe 3.75 stroke,
5.7 Scat rods,
Dart Iron Eagle 72 CC heads,
Roller tip 1.6 rocker arms,,, steel stamped
12-292 cam,,, 501 lift I think and 110 lobe separation,,,, need to look up more on this one.

Domed piston but I could not get the dome CC,

Holley 750 double pump vacuum secondary carb,
Not sure of the intake but it's definitely not a street intake,,, single plain high rise,,, probably Edelbrock,

Oaky that's all I can think of at the moment.