RE: K&B .65 Sportster
Hi Bob,
yes the twist 61 is a very good engine so is the ABC 40 if you have one. We did some testing on the K&B40 abc with a diesel head when they came out and were suprised to see it turn an 11/7 at 13,200 rpm. K&B has always made a very good motor performance wise, just sometimes that their execution of the engine was a little off.But I've used them from the early 50's till the present day with no real issues.
Dennis