Hello Mr. Montey, I am breaking in a plus 21-5k for my truggy, I normaly race buggy, but wanted to try a new class, and boy was it a blast. I used my buggies plus4 in her and was not bad at all. Will my 5k with a 063 pipe set work well in my truggy? should I reshim her for 30%, if so what specs? I have a little over a quart on her and did notice a little slop when stuck at tdc at the connecting rod and journal I asume as I have not opened her up since new when sealing it, is this normal on the 5k? I was thinking of 77 or 100 odonnell plug for it. Can you shed some light for me sir. Thank you.