I have a friend with a stroked 340 in his Challenger. He runs a 727 with a Gear Vendors but really wants to make the switch to a manual trans with overdrive. He is always low on bucks and works as many side jobs as he can find, but rarely ever falls into a $4000 chunk at one time. He also has heard of Kiesler customers that didnt like the ratios in the TKO trans. He really cannot afford to waste the money. If the Passon trans has what appears to be ratios similar to an 833 with a .70 overdrive, he could drive a standard 4 speed car to get a feel of the ratio spread.
He is the type that would probably piece together all the stock manual trans stuff and then just buy the trans, shifter and linkage new. I'm sure that this method would reduce costs, right?