Ive been doing some research on diff heads. I am going to do a budget rebuild this winter, with stock bottom end except new 30 over pistons. Since it is going to be budget the heads are not going to be new. So I did some searching and found that 351W prior to 74? are good, 289 hi-po heads, or E7's ported by Thumper? Wich would be the best for the job. Also what size valves would work best? No matter which I get they will be ported with hardend valve seats put in and cleaned up. Also I was going to go with 10:1 -10.5:1 comp. The motor will be carb. with a holley 650 and a dual plane intake. This motor will see alot of street driving and some track, So I want somthing with good low end torque, but sill wind out good top end. Thanks all