What would be a good rear end/transmission for a 55 chevy with 427c.i. crate motor
9'" or 10" Ford "posi" rear ends are a common swap. Many after market companies have them all set up for your application & you choose the ratio like 3:73 to 4:10 for street, or 4:56 to 4:88 for drag racing. I am an old drag racer & had a 1969 427" L-88 Camaro with a 400 series Turbohydro automatic trans, HD valve body, & small dia. 2000rpm stall speed converter. I ran low 11's high 10's in 69' & 70. And without all the manual trans & clutch problems with like Muncie 4 speeds. But if you must, buy a 6 speed trans, there are many out there. Jim K.
How are you going to drive it? Street every day? Higher gears for gas economy. Just tour around a bit? 4.11 or around there, great off the line, low top end, poor mileage. Like James above said, a good 5 or 6 speed with low first and second gears and OD on the top is a great fix, stay stock then. 4.11 gears and a 6 speed will get you 20 MPH? in first, not really good. Great after market stuff to beautify it also.
Must you ask, how to drive a big block 55" ? Fast that's how! Top end isn't important for a flying Belair box, unless you're on the freeway ALL the time. Go automatic & forget all the trans, shifter, clutch disc, flywheel, throw-out bearing, linkage, axial, etc., crap! A modern tilt steering column with auto trans lever looks so cool on old Chevy's. Besides your wife or girlfriend can sit right next to you with your arm around her.
Only trying to answer the question asked, not give a lecture. He asked a question and not all people want to go fast. Fast is fun yes, and a big block even with a 4:11 type rear end will go fast, just get there faster. If cruising is in mind, that's different than taking it to the strip every weekend. People here ask for opinions, now he has two to pick from at the moment. :-)
I drove my turbo hydro 400 auto trans 69' big block Camaro (4:10 posi) to the track every weekend to beat up on mopar hemis since they dominated the auto trans A/SA class. Cruising around in the 55' would be cool too listening to the cam at 3000 rpm's. Big block Chevy's with headers sound so good! So yeah an all purpose custom car has many uses.
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