terry

Pretty early R model with that tank and bracket, they were bullit proof, very little would go wrong with them. terry

Glitter is a failure somewhere, yes or no?

A twin countershaft would not be a mack box. your triplex is probably a single disk push clutch with no clutch brake, a 13 spd would be a double disk pull clutch with a clutch brake, but it can be made to fit! terry

Good info there! terry

Going to a 4.64 from a 4.42 will slow you down. terry

I would put just what it says. terry

What are the ratio of the old rears? i have seen guys drill the rears without holes for the transverse rod and use it.But always seen them use studs in the housings. You can mate an old end to a new end by cutting and putting in a sleeve and welding, but you have to be real close on length. terry

I believe it has to have a splined counter shaft. terry

Thanks for the explanation. terry

Do you use a dial indicator? terry

Got to be hard on a 4 cyl. to get that kind of horsepower. terry

Sounds like you got the goodies out of the tahoe. terry

Been driving a RB dump for about 3 years, they have real long tapered front springs, do ride softer than a RD. It has a pretty heavy duty single frame. They do lean pretty bad if you corner too fast. But I am still partial to a DM or RD, I owned my own DM for about 20 years. terry

Don't know what kind of chambers you now have, but the 30/30's might be to big to clear. terry

Sounds like your good to go! terry