What are the advertised numbers seat to seat?
I don't want to rain on your parade, but that OD box is a 3 plus 1. The ratios are very wide,(3.09-1.67-1.00-.73), like an automatic, but you don't have the TC to help you. The splits are 54% and 60%, and 73 into od
That tranny is a 3plus1 on account of the OD gear is strictly for cruising. I broke two of them. One with a 367, the other with a teener. Both by shifting into them under too much power.
The 3.09 x 3.55 =10.97 is a great starter gear! In laid back driving, typically you will shift at 2800 or so, and that makes the Rs at drop in, to be, .54 x 2800=1512. The road gear at this point is 3.55 x 1.67=5.93. This is a one-two-punch of crap. First your engine is down in the basement as to torque, and secondly it is saddled with what it thinks is a 3.08 rear gear. This is not a whiplash cam combo. That cam will drive your Dcr into the basement, and make a bad situation even worse.
So If the 3.55s and the OD box are staying; Either, A) don't shift at 2800 ever, or B), you are gonna need to pick up the low speed torque on that 383.
> OK you say, but what about shifting at some higher rpm, like 3600? Sure, but realize that at 3600 you are wound out to 26mph and sounding like a Rustang poser. And on the shift into second, the Rs drop to 1944 and you are still stuck with that same 5.93 second gear, that the engine thinks are 3.08s comparred to the regular 4 speed with it's 1.92 second gear ratio. So now your 383 is forced to pull from 1944. Got torque there?; Not much with a whiplash cam that is dumping compression.
Ok so enough chit-chat.
>If you insist on running that combo forget a performance cam. Forget rumpidy-rump. You need a cam, in an engine, that makes gobs of torque right off idle.So for you, that means a very careful marriage of compression and cam and octane. Very careful.
>But when you get it right, it will be awesome cuz second gear will take you to 60mph at about 4400 and the tires will be singing the whole way. I know this, to be a fact, cuz my 367 was built that way at one time, running the same box and gears, and it could do it. Your bigger.
