http://www.volkszone.com/VZi/showthread.php?t=335858

Read that and let me know guys!

for $50, it's a decent start.....looks to be a bus motor which is a tad different than the 914 motors, but nothing too critical

According to http://tunacan.net/t4 , it's a late closed-breather Bus motor. You'll have to machine the breather to fit any of the upright conversions (if you're going that route). If you're staying with pancake cooling, it should work reasonably in a rear-engine'd application. (Oil fill and dispstick would interfere with the firewall in a 914 application.)

Should have square-port heads. 914 exhausts will not fit, but then again they wouldn't exactly work well in a Bug anyway.

--DD