I have a set of C6AE-R date codes 6A18 & 6A26, standard valves,double springs,
2.26x1.34 int. ports, and have the 16 bolt exhaust pattern.
These look like a good candidate to modify to the larger 2.09 1.66
valves. Will this be able to be done? Or should i just get a set of 428 CJ heads. And im not sure what the chamber size is on these heads , appear to be in the 72-74 range.
Goin on 390 .060 over using flattops with .010 deck clearance, wanting to run around 10.0-1 comp.