street car or street strip
close ratio means not as big of a jump between gears so as you shift you can keep your rpm's in the power better
i like the m22 rock crusher internals are dam near unbreakable my old man had a 10.50 nova way back in the day 402 bbc 13.5:1 rectangular port heads box tunnel ram 2 660 center squirters and 5:13 gears he split the cast aluminum case in half then put a super t 10 in
all depends on the use intended
but a t 10 or super t 10 should be fine in your app both 4 sppeds both come in a few different gear sets