Zep
Moderator
- Messages
- 9,299
The blocks are probably not interchangeable but it might be possible to fit the crank to the original block. Then you have to contend with block deck height, whether the liners will fit (or just stick with the 4.2 liners and pistons and end up with a 4.5) It’s a bit of a mare, but one day someone might take the plunge and we will find out.