Ever since I put in the T-5 and modern rear end it started using more gas so I went to the junkyard and grabbed the jet and power valve spring from a 60 wagon with a 235/powerglide. It had a 42 jet which was a little too small and I did find another carb in the shed and it had a 51 jet and its in and seems to be working just fine,I hope I can get some more driving in before the snow flies so I can get a reading off the plugs and see if the gas consumption goes down. It has 2.79 gears and probably is a little too tall but with the T-5 from a 2.8 it gets out of its way just fine and does not do too bad and I cant use 5th much but its alot better then with the original trans and rear end.