Quote:
Originally Posted by ericwoo
Noted. Do you think I would benefit from porting work? I read conflicting info about 350's if it is worth the work.
The 80cc head came with heavily cast raised lettering "KRE 6500" and then very lightly raised cast number on the other side which I think reads "1395R" then a number 6 below it which seems to be printed on with two circles around it.
The 60 cc head also came with heavily cast raised lettering "KRE 6500" and then very lightly raised cast number on the other side which I think reads "04552".
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What is your goal?
How much power do you want or can you afford?
How will you use the car also dictates whether porting would be a good idea. The KRE's are good heads off the shelf.
The KRE 6500 casting number is for the foundry to identify castings so they don't accidentally ship a ford casting to the Pontiac customer. KRE then takes that casting and machines it into their products. I believe that the basic KRE D-ports all have the same casting number unlike what you see from the OE's. I believe KRE stamps their heads for identification. I'd go look but my only set of KRE's are at the porter at present.
Also posting photos of the combustion chambers of both heads may allow the more experienced folks to determine if they started out the same size and one head had .050 thousands plus cut off od it or did they in fact they left KRE as mismatched heads.
Personally I believe that the difference in combustion chamber size was a result of machining at the machine shop. A friendly inquiring call to Kauffman would provide the answer to that question.
Where did you purchase the heads?