All I can add is the SD is very low profile and the RPM is VERY tall. I dont think you'll have a problem lighting em up either way. If hood clearance will allow (a low profile air cleaner can take care of some of that) I'd probably go with the RPM & it is a dual plane square bore flange & the SD is a single plane spread bore flange


live every 24 hour block of time like it's your last day on earth