I have to chime in for the beast 292. I bought my side mounts made. plenty of head room for the taller engine until you start putting blowers and multiple carbs up there and then things get a little tight. I have been collecting 250's and 292's so I hope it catches on. They can still be found cheep from the belly button crowd. I just bought a 292 and two 250's all for $300.

Old enough to know better, too young to resist.