Jason,

Thanks for your inquiry and the opportunity at earning your business. Regarding your GM big block 454 7.4L marine engine replacement I’ve attached a couple of technical links for you to review. These links will help you correctly identify which version (Mark IV or Gen V) of marine engine you are replacing. Let me know if you need any further technical information or help placing your order. In either case I will be glad to assist!

Link to Big Block V8 Identification
http://tinyurl.com/yb7zudr

Link to Where Your Block Code is Located
http://tinyurl.com/2cotqd6

Link to Available Products
http://tinyurl.com/ykxnsba
 
Regards

 
Performance Product Technologies/IShopBoating
8002 West 6th Street
Stillwater, OK 74074
(405) 533-3812
Fax (775) 257-1769
[email protected]
www.perfprotech.com

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