Omc cobra 5.0 heads

jcdubbu

Cadet
Joined
Aug 22, 2013
Messages
17
Looking into rebuilding my 302 in a 95 seaswirl spyder. Was told that it has 351 heads on it from the factory. Was wondering if anyone knew if this was true. Thanks in advance
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
47,557
And some use the 302 crank, some use the 351 crank (different firing orders). This is important if you get a new cam
 

skippy2235

Petty Officer 2nd Class
Joined
Aug 24, 2009
Messages
138
My 1993 351W cobra came with factory GT40 heads.
I did not know at the time, but learned, they are a prized item to have.
The shop that re-built them was quit impressed and loved working on them.
I still dont understand why.
 

jcdubbu

Cadet
Joined
Aug 22, 2013
Messages
17
Guess I'll have to do some in depth research before I go ordering a master rebuild kit...thanks
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
47,557
You will always do well if you have a knowledgeable machine shop
 

vasy

Petty Officer 2nd Class
Joined
Dec 14, 2014
Messages
193
I got 1995 Seaswirl as well and on my motor the firing order sticker indicated 1-3-7 which is indication of the motor at least having a 351 crank.
I dunno about the heads though.
 
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