258 inline 6.
When we rebuilt it, we took it up to a local shop where the guy does racing engines and had him rebuild the head and install hardened valve seats so we could run unleaded fuel.
We've certainly had our share of trouble over the year it took to get it back on the road, but that was mainly due to today's sloppy job on quality parts. Installed a new distributor and within 30 miles the condenser went out! Then the sending unit, a nice ROUND o ring rather than a flat gasket. Kept working its way out and after the 3rd pull down on the tank, I noticed a tiny rubber o ring around one of the return line areas on the sending unit was crumbling and fell out! Got that all fixed and now just waiting on the exhaust. T
The shop said hes going to have it ready on friday and install a new exhaust with a baffled glass pack that will hold up on the rough trails. Hope its not loud, I only like that on a good car, not my hunting rig!