i will warn you if you use alan at engine engineering, that u will wait 3 months for the bottom end to come back!, but he has good prices and been doing it for years....

the pistons are another story as u cant tell till the bottom end has been dismantled and see what oversize u need, could be 0.5mm in your case, mine was 1mm overbore but mine was on 140k miles!, but keep 500 quid aside for these, speak to p.t.s, thats where i got mine from 01582731733, or burton power. The arps i got from a place in performance ford mag, think it was amber performance, u will need a uprated clutch that technicclutch one is ok ive got that one.

alan can also lighten your flywheel i had this done with the 400 quid price

but ive used p.t.s for just about everything and burton power and couldnt fault them!