Quote:
Originally Posted by PeteVS
What's the length of your '40 torque tube? I'm putting together a '29 with a SBC. Temporarily, I'm using an A rear. (I have a '40 rear waiting in my trailer.) According to my measurements, a '32 and an A both have the same distance between the bell mouth on the torque tube to the centerline of the front crossmember. So, I set up my motor mounts based on the A rear / '39 trans / Offenhauser adapter. To clear the crank pulley, I grafted in the rear flange of a donor crossmember to get that space. For the heads and distributor, I'm cutting out pieces of the firewall and welding in little boxes and a half of a 6" fire extinguisher. I didn't want to loose too much floor room by doing a drastic recessed firewall.
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I dont have the chassis in front of me to measure the torque tube but i sorta remember 51" but to determine that is to mount the motor to the measurement in the book then the transmission crossmember of choice.
The 51" is a 40 rear with the spring on top.
There was also something about the measurement in the book was for a 59 AB and not a 8BA
but i know from 2 old hotrodded Model A i have that still have model A rears both have had the firewalls cut. Both have 39 transmissions , one 8Ba the other a 265 chevy. And how much gets cut also depends on the body sitting stock or channeled
Flathead powered model A's that i have had in the past with 59AB motors set up to the tardel measurement cleared the firewall . Was hoping to find out if the chevy will clear on this car the way it sits before starting anything.