Some one bought it, me for RV6A Rotary, I know it's a little shorter than I would have liked but, It'll be a good start, it is the high pitch magnun.  Now I have a question;  what is the latest & greatest spark plugs being used in the 13B GM coils no turbo, and is anyone useing a thermostat or just weld over the bypass hole & forget the idea, I can still try it at this point but have to decide soon things are happening fast?  I don't even get to read mail on time, just cleaned up 185 e-mails, you guys talk a lot. (keep it up)  thanks,  David.