01-09-2018, 09:33 PM
I concur with the others, fitting a CR box either 3 or 4 speed will be the single best tuning mod you can do in a special. On the road a 5.25 rear end with 19" would be my choice however a friend prefers 4.9 in his car as it keeps the revs lower when crusing, he does however admit he prefers the 5.25 for speed work. I have use a variety of wheel and tyre combinations for hill climbing, it is a quick and easy way to alter the final drive ratio, however aesthetically some sizes just look better and in competition some combinations are not acceptable, particularly with UK regulations.
Black Art Enthusiast