So far I've had trucks equipped with the 230, 235, and 250 sixes, and also the 283 V8. I'm not so impressed with the 235, when compared to the later 230 or 250. I've got no complaints with the 283 either, but I must say that wrenching on the sixes is a whole lot easier with all that room around the engine. EVERYTHING is in plain sight and easy to reach (including the distributor). The simplicity is almost silly sometimes. Heck, you can fix just about anything with a screwdriver and a pair of pliers!