Today I own a CJ7 with amc 304 V8. Nothing special, except here in Belgium it’s quite rare. Almost all cj’s here are 6 inline. Next month I finally receive my 401 . This engine I will try to rebuild completely and at the same time add some horsepower. In Belgium there are no AMC specialists so I need your help for working on it. Octane ratings in my country for gasoline are 95 and 98, but I will run most off the time on LPG (mix of propane and butane).
I will use the engine for towing, a sprint at traffic lights (I can’t resist ), sometimes pulling some loads, and occasionally some off road.
I already found a interesting article ‘building an amc brute’ of Carcraft, and that performance is infectious. This will be the first amc I rebuild. I will first start with the cylinder heads: porting inlet and exhaust and open the chamber, perhaps some bigger valves than stock.
So I need all info about porting the heads and unshrouding the valves,chevy valves..., pictures and drawings are very welcome!!!

Thanks