What GM create engine to buy for 3/4 ton 72 C20

[jocko]

[QUOTE=truckster;8082963]Jocko, the HT 383 has a hydraulic roller cam: http://www.chevrolet.com/performance...l-block-ht-383

Thanks - that’s certainly what i was expecting, was surprised that Scoggin Dickey listed it as a flat tappet. Ok, scratch that detractor! Good point on 383 cam in the L31. Has anyone does this that can confirm you won’t kiss a piston in the slightly higher compression L31 with the slightly higher lift of the HT383 cam? I highly doubt it, the lift isn’t “that” aggressive, but would be a comforting data point. I’d probably go with the 383’s intake also. Considering GM Parts prices - by the time you add a flexplate, manifold, electric go, and cam, you might be tickling just south of the 383’s price tag, and you could use a mech pump with the 383 . Still, sure don’t need a forged crank for an old truck, so there are some savings to be had with any L31 approach.

[truckster]

[quote=jocko;8083021]

Originally Posted by truckster

Jocko, the HT 383 has a hydraulic roller cam: http://www.chevrolet.com/performance...l-block-ht-383

Has anyone does this that can confirm you won’t kiss a piston in the slightly higher compression L31 with the slightly higher lift of the HT383?

That's what I have in mine. I haven't fired it up yet, but my machinist confirmed it's good to go and it turns without hitting anything.

[jocko]

[quote=truckster;8083046]

Originally Posted by jocko

That's what I have in mine. I haven't fired it up yet, but my machinist confirmed it's good to go and it turns without hitting anything.

Thx Truckster. Noted - good info.