Although probably not what you are looking for here I go...
first of all, did you match your intake to the rest of your Combos RPM range? ie cam, gears, pistons? If so, how are you going to pull the extra 1500 RPMs?

Assuming that you did here is the next:
I have heard that a dual tunnel ram is a pain in the ass to tune...and if you want to daily drive it, that might be tough!! If you used cast pistons Nitros Oxide would probably destroy your motor at 7000 RPMs and used a healthy Shot.

There is a lot better info out there then that...that is just the hearsay that I have heard. Experienced people, or more knowledgeable wanna have a go at it, how did I do?

Jeff Given
[addsig]