Mopar engine builders in Los Angeles, CA?

[SBDave]

Wasn't sure where to post this and I realize there aren't a ton of mopar folks on this site but figured I'd give it a shot anyways.

I'm looking for a good Mopar engine builder in the LA area. I'm driving from Santa Barbara, CA to Big Bear Lake, CA via HWY 101 and 210 this Thursday and figured it would be a good time to stop by any shops on the route. I'll also be driving from SB to Newport Beach in a week so I'd also like to know of any shops that way. I've already posted this on Mopar specific websites and tried all kinds of internet searches but so far haven't had any luck.

Thanks y'all!
Dave