John's old spec was as follows, and was VERY quick

Engine 200 block with 6 long studs on .5 bore size with mahle pistons 7.6-1 ratio with valve cut out's standard crank and rod's with uprated cosworth oil pump and big wing sump.Cylinder head ported and polished by Nick Waples bd14 inlet cam standard exhaust cam with double valve srings.Turbo is a t38 twin roller bearing by cr turbo's with a gt front housing to take a 76mm hose.1000cc injectors with a pectel t2 ecu dyno mapped by harvey gibbs @SCS.