can anyone tell me if the 1500 sp heads are differant to 1600 sp heads.

the reason i ask is, if you put 1600 piston barrel kit on a 1500 do you get an increase in comp ratio.

Original 1600 Type 3 had single port heads @ 7.7:1 if I recall correctly. 1500 single port Type 3 was 7.8:1. Same heads back then.

DH