That's a lot of sustained RPMs for an inline. Because of the shorter stroke the 250 will handle higher Rs better. Because of the long stroke the 292 doesn't need high Rs. If you want to wind one up turbo a 230. It will sing! When I thought I was going to have to rebuild my '70 Blazer I was going to pull the 350 and put in a 292. The V8 is still ok but when it quits it's gone! At any rate don't let a cheap 292 get away.
