We used an M21 behind our 320 buy machining the stock manual bell housing. Worked GREAT!!! Ended up with 385HP to the rear wheels with a 500 2bbl. Holley that was modded to flow close to 600. This was back in the mid 60's on a roundy round stock car know as "BIG RED". That tiny 5 bolt top cover trans. WILL NOT take any kind of abuse as the gears are made of "GLASS" just FYI.
Tom Telesco
Classic and Muscle Automotive
12 Cook St.
Norwalk, CT 06853-1601
Day Phone 203-324-6045 ET
NailHead Mini-Starters '53-'66
Adjustable Roller Tip Rocker Arms - All NailHeads
Custom forged pistons
Front & rear neoprene seals
Many other "Nail" parts
"If I can't get it, you don't need it!"
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