@Eric N posted:
. . . . cb 2210-2332 builders kit 170-200hp, and either a 185 65 r15 or 195 60 r15 mounted on vintage 5's. Rancho Transaxles recommended their Pro-street IRS model with a 3.88r/p - 3.11/1.93/1.22/.82 gearing.
IRS ??? Are you sure you want a IRS transaxle, not a swing-axle setup?
And, at 170-200 hp I think you'd be happier with 3.44 r&p.