Cheers Dave.
I will need to do some measuring at home.
But ideally I wiould like to be crossing the finish line at about 5500rpm in 4th gear.
The tyres I am looking at are
Hoosier*D.O.T. Drag Radial White Letters&partnum=76R5DDR&tab=Sizes for the rear end.
The 275/60 R15 is a 27.99 rolling diameter.
Or they also do a 275/50 R15 with rolling diameter of 25.83
Not sure if you can work out an "ideal" ratio with those numbers?
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Cruising in 5th
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Never be afraid to do something new, Remember, Amateurs built the Ark: Professionals built the Titanic.