A while ago I fitted my 2.5 engine, contacted Bob Rawl, who gasped at the spec knowing it was on the 'chocolate pistons' and I promptly removed it and replaced the original 2.0 engine.

The 2.5 is sitting on the engine stand looking unloved, albeit with a new belt kit, uprated idlers and new 11mm oil pump.

So, I've been advise by Alyn to closed deck it, which seems a good idea. What I need advice on is which pistons and rods to go for?

Do I really need a Nitrided crank or will the standard crank do?

Obviously I'll fit new ACL bearings or equivalent.

Oh and I've never built and engine before -it can't be that hard surely??? ;-)