any one used a busa engine with a 3.54 diff and 195 50 15 tyres ?

Not answering your question but. If you use an atlas axle you can get a 3.09:1 crown wheel and pinion for around a tenner if your wanting a higher ratio.

where can i get i get a crown wheel and pinion gear for £10 for an atlas?!

I bought one on ebay, was thinking of going bec.

So if you want it ? it owes me a tenner come and fetch

Like I said its a 3.09 I think from a 2.8 L

i've got a 3.44 at the minute. you don't have the rest of the diff do you? or just the carrier.
might be interested as a spare, but i'll need to really see how the one i've got works for me. theoretical top speed for mine is already 190mph based on gearing :L

you can also get longer 5th and 6th gears which is a common mod...