hello there are three very different block and cyl.sizes.the cyl match each block/and cant be interchanged.you want a fast car buy a vette. bob miller -----Original Message----- From: therealdmcvegas [mailto:DMCVegas@xxxx] Subject: [DML] Misc PRV Question. 3. Are the 3.0 litre pistons, sleeves, and heads compatable with the B28F block? Are modifications nessisary? -Robert vin 6585 "X"