Mopower71
Speed Demon
Also the Demon came with the 340/4spd when I bought it. I ran it a few times and was breaking stuff. So I put my 440/auto in it. Figuring I had that one where it wouldn't break. Did a bunch of fixes to the wiring, rear end etc. The rear actually got a 4:10 and spool to replace the loose 4:88's that were there. It also got new axles to replace the twisted one that was in it, then I had to replace the caliper brackets, because I the axles were sent with the wrong bearings. It goes on and on.