I have a 78 F150 that im slowly building up for some truck pulling. I alo want to still be able to drive it on the street. I know this is a hard combo to pull off. It has 3.50 gears in it now and firts gear is just too high even in low 4wd. Who makes a lower gear set for these transmissions? If i had a lower 1st gear then I could still maintain a decient rear ratio to drive it on the road. The transmission right now has a B&M compition style shift kit, adjustable modualtor valve and a 2300 stall convertor. The least expensive way to gear it down would be the best.