JP-3 or maybe the Losi RE-10 pipe (or was it the RE11? Whichever one is more of an all-rounder...)

I ran a Mach 427 (same engine as your Dynamite, basically.. Same factory probably..) in a buggy years ago with a stock RTR Losi pipe from an 8ight buggy and it was great...

http://s166.photobucket.com/user/her...06403.mp4.html

For gearing, if stock is 14 you could probably go with a 15...