4.3gl to 5.7 swap

[JLARSON]

I have a 99 larson with a 4.3gl that has come apart. My question is what all needs to be changed in the exhaust system other than the manifolds to drop in a 5.0 or 5.7 sbc? Volvo penta store show diffrent part numbers for y pipe and elbow but they appear the same.

 

[bondo]

I have a 99 larson with a 4.3gl that has come apart. My question is what all needs to be changed in the exhaust system other than the manifolds to drop in a 5.0 or 5.7 sbc? Volvo penta store show diffrent part numbers for y pipe and elbow but they appear the same.

Ayuh,.... Donno 'bout the exhaust,... But,...

I can tell ya, the outdrive's gear ratio is ALL Wrong, 'n you won't be able to buy a prop Big enough, unless ya change the Gear Ratio/ outdrive...