In need of some advice
 

Have just acquired a 2nd hand cougar sv, I've gone to put my 7.5t motor in with 26 pinion an it's a very tight fit, I think the spur maybe an 82 as the spare that came with it is, is it better to put a smaller pinion like 23 or will it overheat?

23/24 will work fine ;)

Will give it a go mate thanks

26 to big, 22,23,24 be best

Found a 23 an seems fine so I guess should be ok, take it that'll go well with 82 spur

yeah, no problems!