Correct Chassis for TAG/Parilla Leopard

[Gene]

After two years of Sr Sportsman, w/ a Woltjer Yam 100, 4-hole can on each, an R30C-Y(335 lbs), and a Q31SP(360lbs), I'm moving into Tag.
Because I wish to Race at 355 lbs, I'll be using a brand new Parilla Leopard prepared by Woltjer (thoughts on engine choice?)
I thought about using the Q31SP since it always handled really good at 360 lbs. I thought I might be able to make it work with the higher horsepower. But I just don't want it to work, I want the Birel to beat all the Top Karts, Margays, Ital Karts, CRG, Tony Kart, Trackmagics etc, etc, that will be competing (currently no less than 25 entries per in Tag class per race weakened, with at least ten different manufactures)
Decision?
Should I pursue that route, the Q31SP, or should I purchase one of the new 2006 frames? Hubs or spindles in the front?
Which Birel frame(s) (2005 or 2006, that I can still get new) would be the right choice for engine and this track?
1/2 mile, flat, permanent,
http://www.etownraceway.com/main/karting/images/KartOverheadV.jpg
plus I will race at 4 nationals this year.
I weigh 153 lbs, race ready.
Thank you for any help.
Long Live Birel!

[Jean Stafford]

Gene,

If you plan to race the Nationals this year, get the latest chassis you can afford. The other thing is, most karts are homologated for three years, and after that you might not be able to get replacement parts for then as easily as a newer chassis.

The Q31 should do you jkust fine, if you elect to stay with it, but if you decide to move up, at 153# you might consider a R32M. A little stiffer, and with all the latest bells and whistles.

Jean Stafford
Stafford's Racing Products
www.staffordsraciing.com