I have a 1929 Buick that I am setting up as a street rod. I am installing a 9" disc brake ford rear end from a Granada. I belive this rear end to have about a 2.75 gear as installed from the factory. I bought a set of 370s and a rebuild kit for it. This is what I really wanted to do, but am reconsidering. I am wondering if someone that is really knows what they are talking about has any opinions on this.
Right now, the intent is to put a 95 Chevy LT1 with a 383 stroker kit in this car with a 700R4. I am more concerned with driving ecomomy than power, as the stroker will have lots of torque.
Several years back, I read a tech article that GM had on a new camshaft that they had on the market. It is a full roller cam, part #10134334. I don't remember the specs on this cam or I would post them. The article read that in the test of this cam, GM bought a 350 chevy engine from a junk yard with about 100,000 miles on it to simulate a well used engine that a back yard builder might be using. They did absolutely nothing to this engine but install this cam and an aftermarket aluminum intake with a stock quadrajet carb. It dyno'd out a 345 HP.
I had no use for this cam at the time but thought I might at a later date, so I ordered one. It is still in the unopened box. I intend to replace the LT1 cam with this one and add 1.6 roller rockers, since I already have them also. I am going to run a set of pretty tall tires on this car, 235/70-R16. I don't want short tires on this car, they would look wierd because of the extra large wheel well openings. I am kind of cencerned about using the stock 275s, but really don't want to get into rebuilding the rear right now without trying it first. I know that this is a really tall gear for a 700R4 with lockup, but I was talking to someone else that had a very similar setup except it was a stock 454. He said he could run all day at 80 MPH with the air on in a very large 42 Cadillac 4 dr and still get 24 MPG.
This car is very boxey and will have a lot of wind resistance. It is not going to be a very heavy car. The final weight I don't know yet. I know that it will probably not much more than idle at 70 MPH.
What are your opinions on this?? I know that the 370s would work best, but am curious as to how it would do with the 275s. Anyone have experience in this situation?

Thanks, Ed