Need help with cylinder head ID

[mmajor97]

I have a chevy 305 vintage 1980 - 1985 in my boat. I have a set of heads with the casting number 14102193 sitting in my garage right now. I have searched the internet for this casting number and all it says is 350/305 swirl port heads for TBI motors. I am wondering if these would work on my 305 or if the combustion chamber is too big? Any advise will be much appreciated. Thank you in advance.

 

[Bondo]

Re: Need help with cylinder head ID

Ayuh,... They'll Work, but I'm not sure of the combustion chamber size..

 

[mkast]

Re: Need help with cylinder head ID

What size are the original combustion chambers and what size are the replacements?
As the combustion chamber size increases, the compression ratio will decrease.

 

[mmajor97]

Re: Need help with cylinder head ID

From what I have read the old ones are 58cc with 1.84/1.50 and the other ones are 64cc with 1.94/1.5

 

[mkast]

Re: Need help with cylinder head ID

If you want to keep the same compression ratio, mill the heads.

 

[mmajor97]

Re: Need help with cylinder head ID

Would the motor be a total dog if I just used the heads like they are without milling them down?