I have 1985 SUB, 350,700R4/208 TRANNY. First drive started to growl, but it has no problem in od. now it won't drive in 2w only 4w. And when you press on brake, power is not there, it wishes, and kills engine. Also is vapor locking from carb down, takes 30 sec to get gas to carb after this. Replace fuel pump from mech to electric. tune up of : wires, plugs, cap and rotor. and master cylinder. still does all of the above. We really need this working, ti is our only transportation.