340 street build help from experienced input
Thanks! Is that an easy to change over?
Yes; plug and play; I have done exactly that. I ordered the gearset from Passon, and supplied the shaft and tail-piece from my stock, to make it a slip-yoke trans. While I had Jamie on the line I ordered his aluminum box and side-cover as well. I have not ever had problems with this combo or with Jamie's parts.
BTW
even tho the ratios from second to fourth are almost identical to the 2.66low box; NONE of the gears are interchangeable. With the possible exception of the M/S* First; I forget. The tooth counts are all different.
You can often find this "Commando " trans for sale right here on FABO. Usually for a fair price. Everybody has a short tail cast-iron housing for give-away prices. But the large-spline short A-body M/S you might have to cough up some cash for. With 16% more Torque Multiplication, you could theoretically run 16% less rear gear. In practice, I found 3.55s still give the best zero to 60, finishing at 60= 5140 in Second gear, with 27" tires. This then allows a power-peak as low as 4800. Which is like a 220*@.050 cam. And a cam this small brings new vigor to a Lo-Compression engine, and offers the possibility of GREAT fuel economy to a DD.
Edit; M/S is mainshaft
