Not sure what way you would want to go with that. Like said you can make a 4.3 a pretty stout motor but dual exhaust on a 4.3 sounds like an 80's camaro.
Not sure what drive we are talking about but if its a Volvo 270, 80, 90 you will spend more money on a prop (because there is none available in a pitch over a 23) then you would on a drive trying to get the pitch of the prop to compensate for a V6 drive.
A winner is just a loser that got up and did it one more time.
1959 Biesemeyer - 4pt Hydro Drag - 2013 ACBS Winner - Best Race Boat
1967 Nova Marine - SuperNova24 - ACBS Winner - 2012 Best Race Boat - 2016 Peoples Choice & Best Non Wood
1972 John Allmand - Nova 19
1972 John Allmand - Nova19 (#2)
1982 PolarKraft -Jonboat - Crab Killer