369 cylinder heads

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I'm looking on info or pictures of the porsche 369 heads and also are all pre A heads the same what the differences between the 369
Heads besides bore size crank size ... are the valves at a differnt angle than the 506,528,546,527..reason I'm asking is i am looking to have a 1100cc 369 build but looking to see if I could use any pre A heads that I listed above to build a 1100cc stefi g who makes preA repop heads said I could not use those heads to build a 1100cc even after I told him I was gonna use custom cylinders / welding done to them ...so what makes a 369 head differnt....

[TomSimon]

My limited understanding of the 356 heads says that the Porsche pre-A head has the semi-hemi exhaust valves and valve cover, but same head stud pattern as a 36hp VW. Porsche 356A and newer use the wider 356 stud pattern, and different rocker stands (because of the different head stud pattern. I know guy who fitted a pair of pre A heads onto a 36hp vw. It's my understanding (from some reading I've done) that Porsche had heads and rocker arms, but couldn't get the rest of his own engine developed in time to sell some cars. I'm sure needing cash flow, he contracted with VW to supply engine bottom ends. Pre A engine cases where nothing more than VW 36hp engines that were more carefully align bored .010" oversized, maybe some other carefully performed blueprinting tricks more befitting of a hand built sportscar over an economy production "people's car". Porsche called that oversized/accurized align bore of +.010" their "standard case main bearing", which gets confusing when ordering $400 main bearings.

Making a reproduction head, it's easy to imagine changing stud pattern from post A, to pre A. StefG would be a good place to find the answer
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2-time NASA Pro Racing Champion, Bonneville 130 Club and 150 Club Memeber, BRS Pro Gas racer

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