Re: FORD 300 INJECTED SIX IN A CJ
This is a great topic to do a search on, lotsa good info available--it's been discussed 3-4 times in the past 1-2 years.
I disagree with elusive--I think if you compare stock to stock, the 4.9 will outshine the 4.0 in every department, and if you modify both equally, that will continue to happen. The greater displacement really helps. Of course, if you stroke a 4.0, add headers, intake, etc., and compare it to a stock 4.9, it may be a different story. The emissions point is irrelevant if you're swapping to a late model engine either way--and either way you get fuel injection. Parts are cheap and readily available, as are the engines. YOu could probably find a wrecked F150 with that engine and get the whole truck for $1000.
I'm a huge proponent of the 300. That said, were it me, I'd still go with elusive's plan. The PITA that you will have trying to cram a long 300 into a short CJ engine bay will outweigh the benefits. Yes, there are guys who have done it, and someone had some pics at one time...but it would be simpler (although probably not cheaper or more expensive), to swap in a 4.0. And even if a built 4.9 would have an edge, a built 4.0 should provide all the thrust you will ever need. Like elusive said, you've got all the parts to make it work. I think he's got the winning idea. Engine mounts, cooling, wiring...everything should be simpler.