[oil pan 4]

This is going back where it originally came from, the 2wd tan 3/4 ton suburban.
Yes I know the suburban has a 3 speed auto with 4.11 gears, but last year I bought 3.21 gears and an air locker and I have not had time to mess with it. But the machine shop that machined my engine block also does axles and drive shafts. I am going to have them install the gears and show me how to do it since it sounds like the guy running the shop wants to retire some time with in the next 12 to 24 months. He wont be around to do it next time.
Obviously the 1:1 top gear of the transmission and 3.21 gears wont but should be a good improvement over the previous cruise speed of 3,000+ RPM at highway speed but wont be anywhere near what I was talking about it being 1,200 to 1,400 RPM.
To get the cruise that is where the firebird come in.

Anyone who reads my posts is thinking "what firebird?"
I just bought a 1987 firebird with a six speed T56 installed. I think I am going to put it in the firebird with a ford 9 inch rearend with a relatively numerically low rear end gear, a 3:1 or more likely a 3.25:1. (Depending on if the T56 has a 0.5:1 or 0.6:1 top gear)
Problem is the stock T56 is only good for 450 foot pounds of torque. This 7.4L turned 8L engine will make a size appropriate 600+ foot pounds of torque. Posts on the chevelle tech forum say that an engine like this will snap the input shaft right off a stock T56. So I might have to get the upgraded "T56 magnum" which can handle 750 foot pounds of torque. Eh its only money.