Just pulled the motor on my 65. The block has the #30 and under that is 352. but the heads have the #C6AE 6090R. The intake ports on the heads are a lot bigger than the ports on the intake. Got the truck from original owner who said nothing had been done to it. The truck only has 57,000 miles. Thanks for any help.

 

I`m lookin` in a parts interchange book and it says c6ae-r..66-67 352 w/71-74 cc,2.02 int. 1.55 valves,2.34 x 1.34 int. 1.84 x 1.34 exh. ports