Constantly overheated so changed to a moulded and extended CJ-7 combination. Temp stays at 180 degs even in traffic with the little 10" pusher fan on . That's in 97 deg. afternoon sun, our typical afternoon. Measured engine bay, too narrow for any modern V-8 or V-6 so have been looking at a Supra in-line six with turbo(s) to put the oomph into the drive.