so i have no choice but to keep my 8 1/4 rear end for now so i found a sure grip to run but im no sure on the gears and the engines like built for major "streetable power". i want 3.91 gears or 3.55. what bould be best for the street for hard accceloration

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1973 plymouth duster 225 slant six .30 over, erson 270 cam, 9.5 to 1 compression, big valves, headers, and a holley 4 bbl
http://cardomain.com/ride/3135091

hey that thing got a hemi? naw its just a slant six

What tranny are you running? What tire size do you have?
How much mileage are you willing to lose?

If You had an A-833OD and a heavy car I'd be thinking in the 4.11/3.91 range... if you had an automatic and large tires then 3.55's might be a fair compromise.

-D.Idiot

i got the 230 three speed floor shift. im planing to run 235-60 r14.
milage wont matter to much but i would like to drive it on the highway some

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1973 plymouth duster 225 slant six .30 over, erson 270 cam, 9.5 to 1 compression, big valves, headers, and a holley 4 bbl
http://cardomain.com/ride/3135091

hey that thing got a hemi? naw its just a slant six

Probably 3.55's ,if you wanna drive the car quite a bit. You might could get away with 3.91's if the tire is tall enough.

By the way- an 8.25 sure grip will be more than enough to handle a hot
slant six. Why bother with an expensive 8.75 rear that you dont need?
The sure grips are big $$$ for 8.75's as well. I'd only go to 8.75 if you
were going nitrous, turbo or supercharger. The advantage that the
8.75 does have is the ease of gear swaps which is very nice. If you dont like your gears, swap the chunk.

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Michael Glass. Mopar stuff and some rusty Mopar stuff!
1965 Dodge Dart with 66 Valiant front clip. Other stuff...

thanks for the help guys

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1973 plymouth duster 225 slant six .30 over, erson 270 cam, 9.5 to 1 compression, big valves, headers, and a holley 4 bbl
http://cardomain.com/ride/3135091

hey that thing got a hemi? naw its just a slant six