I am thinking of taking the engine out of my saff, and giving it a good going over as it has done a fair few miles, and prevention is better than cure..

Currently it's on T4 850cc's, cosworth forged pistons at 7.2:1 I belive, and a lightly ported head, std cams followers etc.

The Question is, do I change the spec, or leave it alone? Was thinking maybe solid lifters and a serious port job on the head, some uprated cams (unsure on spec?) rollerbearing T4 with a maram shaft etc, or do I put on my GT35 or swap it for a GT30?

Ideally would be well over 500Bhp with hopefully equal amounts of torque and lots of response...

Looking at Std geometry at the moment, but have H section rods to go in etc.