Lol! I am just very interested because I was considering approx the same combo myself. Just curious how much work was required to get to the index. By the way, where does the motor "nose over" ? Obviously the 200 is under carbed and has a serious air flow problem with respect to the heads/intake. This is part of the reason I kinda swayed over towards a more underrated engine with more potential. (3.8 v-6) It's just that inliners are SO cool! Lol!!
The question though would be, where does it nose over and why? Would a longer duration help? or would you just lose more bottom end? Longer or shorter primary pipes? Different valve angles? A set of shubecks and 300# springs? Class racing basically comes down to what engine can put out the most hp/lb which usually consists of RPM and lots of it. Engines that naturaly breath well are favored (chebby) Aftermarket rods/pistons/lifters/springs/etc means you have engines turning 8000 in the lights. Vic Guilmero runs a 429 mustang and spins it to 8200! I almost sh@# when he told me that! D/SA 71 mustang 429, reving like a small block! wow!
Oops...did I get off track here? Lol!
Anyway, please keep the info coming, who knows, I may build a similar combo after I finish working on the bronco,mustang bracket car, kids go carts,etc.