I don't have the exact details, but going from a 144/170 to a 300 is MAJOR change. The 300 is MUCH larger than the smaller inline 6 family 144/170/200 and even the 250. Nothing is impossable, but I doubt you will ever find a stang, falcon, comet with one in it. I could be proved wrong, as a matter of fact I would love to see someone do it, but I just don't think that it is really feasable.