first the problem,i'm using a set of 461 double humps, and i keep running into problems with these heads, i have harland sharp roller rockers and they rub on the casting for the rocker studs so i tried a cheap fix i got stock replacement roller tips,solved that problem now i'm getting coil bind on the valve springs, i was told i need atleast 80 thousandths between coils when cam is at full lift and i only have about 26,so should i have the 461s machined to work or should i just buy a set of heads ? i know i should probably buy heads but it helps to hear someone elses opinion. now what kind of heads should i buy? the 461s are 64 cc which makes my motor about 13:1 i don't mind buying race fuel and it is ready available but should i go to bigger cc,what size intake runners should i get what about valve size my cam is 545/565 solid lift what are the +s and -s to larger cc heads any help would be great
