Originally Posted by Kenworth
The only time propane is worth it is if your converting a big block engine like a 460 or 534 or any other big block engine that doesn't run that great on a carburator. A engine on propane is kinda like a engine on fuel injection it starts easy as the fuel is force fed where as a carburated its venturi.
A 302 on propane is going to be gutless your going to loose quite a bit of power. You will also have to redo the heads with harden valve seats you will also have to be prepared to repair oil leaks propane is dry it causes seals to dry up and you end up with leaks.
If you are going todo a propane conversion look at spending atleast couple grand CND. Here in B.C. a certified shop has to do the certication you can do your own installation but it has to pass inspection.
Anyhow you will be spending hundreds to save pennies its not worth it.
By what theory will it be gutless? Also you will not have to redo valves as long as it is a 73 or newer motor. YOu can raise CR a lot if you want because propane has a octane of about 110.