Likely the air cooled flat 4 that was in the standard beetle (and all variations of it that existed in 1962)
If there will be a tuner or sleeper version will there be a Subaru flat 4 stuck in the small engine room?
Just went through all of the posts, and i've got to say that i'm pumped for it, it looks great so far. Also, if you're okay with it, i'd like to help to get some sounds for it... when it's close to being done or atleast usable of course. Well, i'm also pretty "okay" on jbeam'ing, so anything you need, just ask, i'll do my best to assist.
I think sounds would have a nice addition, I put in some sound but it wsa from another sound mod so it would be good to replace it