D
dapper
Guest
hello, i am looking for info on a cyl.head for corvette 60-67 called a power pack head. supposedly the corvettes in the late 50's and early 60's came with aluminun heads, which either warped or cracked, so a service bulletin went out to replace the aluminun heads with these power pack heads. what i want to do is get a copy of that service bulletin or info on the intake valve size, was it 1.72" dia. or was there a option to go up to a 1.94" dia intake valve. i know this is problaly very technical but i need this info quick! any helpers out there thanks dapper