350 2bbl to 4bbl conversion / edelbrock

michaelvt

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Jun 8, 2011
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Hi,
My name is Michael I live in France and I would like to upgrade my mercruisers 350.
I run an old Italian powerboat (Riva Monte Carlo 30)
I have restored it to good running condition(I am not a pro)
Originally it runs Crusader 454's , but these were replaced by 2 350 mercruiser vortech's

Can anybody advise me on a 4bbl upgrade , using maybe edelbrock parts??
at the moment , I run 2bbl mercabs on Mercruiser 1998 Vortech 5.7l
I have seen that a good combination is a 1409 carburettor with 2716 intake manifold.
Would this work on my engines , is it compatible with salt water (the med sea)
any special parts needed to bolt or fit on my blocks?

Any help would be greatly appreciated as I am new to this....
(most marine dealers here have no clue what they are talking about)
 
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