Hi, can anyone help me out.

My friend is forging a version 2 engine and would like to know what he would have to do to fit version 3/4 heads and inlet manifold onto his block or are they direct fit with no messing around?

 

Full phase 1 to 1.5 conversion

 

Any chance you can expand on that please?

 

V3 and V4 Heads are a direct swap to V1-V2 blocks, bolt holes match V1 - 2 manifolds.