1966 904 into LA360. Where do I find the snout bushing?

Easy guys, I’m English, we don’t have Mopar experts or shops on very corner. I’d genuinely never heard of the problem, equally in my ignorance I also didn’t know that the crank register was an issue, hence my request for info. Thanks for all the suggestions, no need to kick me over it.
Thanks for the T’flite Guy info, he was very helpful.
Sounds like a bunch of hassle, previously I’ve built and fitted 360/340 motors to 727s, never had an early Mopar before and was completely unaware.
Looks like my budget is now 360, later 904 and convertor. Probably still cheaper and more worthwhile than rebuilding the tired 273 hi po in it now. I guess.
All good. I've been on the other side of the fence, too; before the internet. I got involved with a guy building an "English Hot Rod"- a Triumph GT6 with a Jag V12. Oh man was that ever a learning experience. To this day I despise anything labeled "Lucas".