The F body spring front section is 4 inches longer than an A body and 2 inches longer than an E body. I tried to find the 4 inch longer front hangers to put on my car for caltracs off an A body and I could not find any. I ended up using the 2 inch longer front hanger with E body springs.
They should make a pump seal for the alcohol gasoline. Chrysler had a recall in the late seventies that replaced the pump seals in all 1 bbl, 2 bbl, and thermoquad carburetors. I would be surprised if the seals you are getting aren't made for the alcohol because in most places that is all you...
The three best 904 family transmissions to start with are these part numbers. 3681844, 4028465, 4028878. These are all non lockup and have the five clutch front drum as long as someone hasn't changed the parts with another trans.
Also I forgot to put a little information in about the bumper. I do not care what shape the chrome is in as I will have it powder coated. All I care about is that it is straight.
I am currently looking for a center hood trim and plain front bumper for said 1978 Aspen. I have a 1977 Aspen and also a good grille for a 1978 so I want to change my front end into a 1978 model.
Plain front bumper=no nerf strip and no guards.
I weighed my car on the scale at the drag race track. At the time it had a full tank of gas, an 8 3/4" rear axle, a 340 with a 904 with T-tops and the extra metal that came with that option, air conditioning, speed control, twin outside rear view mirrors and it came in exactly at 3900 pounds...
At this time it hasn't been up for a while. I don't know if it is finally hosed or it will rise from the dead. We will see. I wish I would have saved some of the things that had been posted but hindsight is 20-20.