Super 6 conversion

In 94 I rebuilt a 225 to replace the tired one in my 1980 Volare. I bought a 77model parts car with a supersix . I asked the builder to pump up the compression to at least 9.5 and move up a cam size or two. I never measured anything, cuz I wasn't looking for a performance increase.The performance increase that I did get,after much tuning,was marginal at best.
Some time later,I installed a wide-ratio 904, a looser TC, and upped the rear gears.All stuff I had laying around).That was a way better deal. If I had it to do over, I would do the gears and TC first. The engine had to be done. But I'd leave the SS stuff for last. I will say though that the 2bbl can make great gas mileage..