Best as far , going in the rough stuff was a 1977 gmc jimmy.
Sold my 72 K-5 and bought a new 1978 K-5 with the full time 4WD. Ended up giving it a 4" lift. 35" tires, Holly, Edlebrock, tube bumpers, etc.
I still have the notebook that I documented everything in it. Sometimes I was down to 3 & 4 miles to the gallon.
Gas was cheap....full steam ahead......
