408 with Victor Jr's Clearance issues

[91whiteghost]

Victor Jr heads ( part no.77189) have 60 cc chambers with 2.05 intake, 1.60 exhaust, same for no 77189 which is a complete head with vale springs and retainers. part no's 77389, 77399 are 70cc chambers , same size valves.preformer rpm heads are 60cc chambers and either 1.90 valves no's 60229 or 2.02 valves no.s 60259,69,602519. piston to valve clearance has to do with the cam profile9 straight up , advanced , retarded etc.) head gasket thickness , piston to deck clearance and depth of valve notch. I assume the pistons are not for a twisted wedge head or something similar. hope these specs help

[rwhite65]

according to the engine build sheet, the pistons are dished, leaving compression to be around 9.25. I assume the builder did this for a reason, but that seems a little low to me unless there was plans for a turbo/super charger. Either way, we looked at the heads today for those part numbers ....and can not find them. Called Edelbrock help line and the guy was flat out rude with my buddy about helping us. He provided no help other then saying the cam in the car now was not nearly sufficient enough for the new heads.

he is gonna run the heads by a local machine shop tom and see if they can be of any assistance.
Ryan

[andy669]

Check how much piston to valve you have with the old heads. If you have a ton, continue with the swap, but be sure to check it with the new heads. If you can get the head to East Moline, I can cc the chamber for you.

Andy