Thanks for the replies!

Definitely not going lower than 3.73.

Same fuel I ran on this motor with cast iron heads. 93 octane. I'm going from big rectangle port heads and 109CC chambers to smaller oval port heads with 110CC chambers. Same size intake / exhaust valves.

I changed the cam from a big solid lift cam to the roller I noted above.

I changed intake from a Performer to the Stealth.

Thanks!