John,

Well I will try to answer a few of the questions here. The KBV .72, .82, BVM .81, .91 and .96 will all bolt into the viojet unit. The .72 was a great engine in its day, the .82 was good, and the .91/.96 were by far the best you could get.

The .82 has more power than the .72, but the .72 is no slouch. The .72 used a stinger type tuned pipe if memory serves me correctly, but I could be wrong here. The pipe for the .82 was a little longer so hence the .72 pipe probably won't work with the .82 (would be real tough to neddle).

The same pipe was used for the .81, .91, and .96. You could get either the standard pressure or puffer pressure pipe for these engines.

If I was you I would search the world for a .91 engine. It was by far the best and will definitely work for you.

John Redman
Team BVM, Jet Cat USA