Do you think I could get away with the 76cc heads and one of the cams I have picked out, if I get some dome pistons? Or I also have a set of 601 casting 305 h.o. heads with 1.94 and 1.5 valves and set up for a max lift of about .510, they are also port and polished with a gasket match on the runners, with smoothed combustion chambers, not real sure on the heads cc's though, some places say 60, 58, and 53cc's so I'm not real sure, just have to measure them I guess. I built a 350 about 2 years ago with a the same 305 ho heads and same mods to them, I used stock type dished pistons,stock crank and rods, with a performer 600cfm carb, a performer intake, and a comp cams 270H camshaft, everyone at the shop told me the engine would not run due to the 10.3 to 1 compresion and that they would fall on there face at about 4500 rpm's, anyhow the engine did run and it ran very very well, it was in a 86 silverado with a 700r4 trans, with a 2000 stall and 373 gears, it would ping if I got on it with regular pump gas but if I backed off the timing it would run fine, it would run great on the 93 octane pump gas though, it also didn't stop pulling until about 5900 rpm's, it would smoke the tires from a dead stop all the way to third gear also.