350 to 305 OMC Head Swap

DangerDan

Petty Officer 1st Class
Joined
May 21, 2005
Messages
260
is it ok to swap out 350 heads with a 305 head? I know it will bump up the comp a point but will this cause any issues?
 

Buttanic

Senior Chief Petty Officer
Joined
Sep 25, 2003
Messages
711
Re: 350 to 305 OMC Head Swap

Besides the compression being too high the valves are smaller on the 305 heads. Overall not a good idea.
 

DangerDan

Petty Officer 1st Class
Joined
May 21, 2005
Messages
260
Re: 350 to 305 OMC Head Swap

I found a set of heads with matching cast # & specs with a 1 yr warranty for a good price. Thanks guys.
 
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