what engine do you have mate ,take the cossy engine it came with t28 ,t3 2wd,4x4,t34,and t4 there is a big difference in them all ,but all worked depends on your power level and boost thresh hold
2.4 litre 210 bhp and 180 some think ft/lb max power is around 6000+ rpm nice low down tractable engine 150 ft/lb at around 3000 rpm i see if he can get a graph sorted but i only see him once and a while
i have rebuilt a few, a mate running a t3/4 on his yb and made 430 bhp on it had to strip it and put a 360 bearing in there ,been on there for 2 years now still going .i have striped some and seen parts missing inside so can be a gamble
this is a pic of mine .it was on a t3 and standard 1600cc
made 107bhp at 6psi ran it up to 12psi then gearbox broke
now a 2000cc with big valve head 660cc injectors and k3 ecu was on megasquirt worked ok
i have an 8 inch fitted in my cortina .i do have some shafts out of a 52 inch
8 inch axle drilled for 4 stud ford if anyone wants them fitted with brandnew
bearings and thicker retaining plates
can't beat an 8 incher
i've used them i know rich ,do know what they doing
all i would say is don't worry about your rolling road fig as they
under most people,my mate used to go to paul hills his car made 220bhp
but when we had it at redline it was 189 bhp with a bit of mapping came out at 224 and was well different