Gary,you guys dont appear to run a lot of propane up there,,I suppose its because you have always had cheap petrol..
We have it down here for an alternative to petrol,and we produce the stuff in large quantities..The system I have,was built for American engines...Its IMPCO brand,works well on the 302w,will work better on the new engine with higher CR..The Australians make a good kit,and in fact,they produce 6cyl.and V8 Ford Falcons dedicated LPG,from the factory..[All injected]
It pays to run hardened valve seats in an LPG engine,you shouldnt need a higher CR with an injected engine,as I think most computers have an anti-knock sensor to adjust themselves to different fuels..
On a carburetted engine,the LPG is routed through the carb,like the petrol,but it is necessary to purge from one fuel to the other,cos they dont like each other..I am no mechanic,so I cant tell you the ins and outs of the workings of it,apart from,when I switch from petrol to LPG,I flick a switch,and as soon as the engine starts to run out of fuel,throw the switch to the other side..[three position switch]
I have an 80 litre tank on my truck,which,because of regulations,is only filled 80%..about 68 litres..I can do a little over 4 hours driving on that tankful..You do use a little more LPG as against petrol,but the difference in price down here,means we go further,or we go more often in the truck,than the car..[I make a $100 saving over petrol on an eight hour trip]
Probably no help to you,but I have a friend,who was up in Chicago somewhere,Murray Thomas,who worked for Rod Millen,in Ca.,for several years..He moved up there and set up a business,Ithink it was called TAD,,Thomas Auto Development.When Murray was still down here,living in Auckland,he ended up running the LPG dept.of the Ford dealer he did his apprenticeship with..He would be the guy to talk to..Are there no dealers/LPG fitters in New York??
I hope this is of some use to you,Gary..I think its a darn good fuel,and if the fitter knows what he is doing,there should be no probs..Maybe we need to send some Kiwis up there and start converting you guys to dual fuel...