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Have Permormance Questions about 57 mercruiser

87concord

Regular Contributor
have an 87 Concord Magnum II.

have an 87 Concord Magnum II. It has a 260hp/5.7 with an Alpha One Drive. I would like to get about 300hp at the prop shaft. Any suggestions would be great!!!
 
"Ayuh,....

Call your local


"Ayuh,....

Call your local MachineShop,+ ask them to build you a motor....
A 383 Stroker motor will easily pull 300hp...
Or,...
Call GM,... They've got 1 they claim is Over 300hp...."
 
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