Replacing a 1988 350 (5.7L) Engine with a 2002 5.7L Vortec engine

[Sophie]

I have a 1988 4 Winns boat w/ a 260 HP 350 (5.7L) Mercruiser engine that needs to be replaced. (All the accessories and exhaust manifolds appear to be in good working order). I want to repalce this older 350 (5.7L) engine with a LATE model 2002 5.7L Vortec Marine Engine. What must be done to accomplish this? I know for sure that the intake manifold will not work (different # of bolt holes) and I will need an electric fuel pump ( Im not sure what type) BUT will I need to replace my 4 barrel carb? What else would I need to add or change? Any help or ideas would be appriciated.

 

[snapperbait]

Re: Replacing a 1988 350 (5.7L) Engine with a 2002 5.7L Vortec engine

All of the parts except the intake (as you noted) will work... <br /><br /> One thing you will need to change is the distributor drive gear if the vortec engine you're swapping in has a roller camshaft rather than a flat tappet camshaft... A GM dealership parts dept. should be able to supply you with the proper gear...<br /><br />The Carb (either Holley or Q-jet) should be fine though you may need to make some minor tuning adjustments....<br /><br />Here's a link for all the parts you might need, including a electric fuel pump...<br /> http://www.ebasicpower.com/