Actually, All Boat Racers Are Crazy....
But most aren't insane.
One year we were getting ready for Parker and Ted Zahorski gave me a V-6 short block form Yamaha's warrantee motors to use.
My dad pulled it a part, ported it and put it back together. Five hours into the race a piston broke on number six hole. We pulled the head, took the rod and piston out and slapped it back together . We finished 4th in MOD VP.
After we got home, my dad was a little surprised that the piston broke. When he checked a little deeper, he realized he'd put a standard piston in a .030 hole. How a new warrantee block had one hole .030 over I never found the reason. Funny, my dad hones it, stuck a .030 back in, and she ran great...
As far as three banger to four banger......I always like "MORE BANG FOR BUCK CLASSES"....Like A Hydro, put an AXS restictor in an you are and AXS, put a J restrictor in and you are a J.....
I was just thinking maybe a three banger would be too slow for a 250 pounder, like me, but maybe a four banger would carry the weight...
I know half a V-8 is a V-4....