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I will pick up a set this evening, which promised to be a very good set (low milage, owner had done a 250 to 272 hp modification 5 years back, which involved new p+c).
The stud spacing must indeed to be redrilled. I will post the difference in stud spacing when I have the set in front of me, Pillow.
Since the original stroke has been approx. 76 mm (from my calculation, could also be 76,4 or so), I should have enough room for keeping the piston from the head with my 71 mm stroke crank and. And because I might go turbo in a later stage, maximum compression ratio is not my goal, quite the opposite. 1:7,8 - 8,0 would be fine, so don't know yet how much must be taken off of the cylinders to achieve this.
The reason for the route originated from the possibility to get the extra displacement for lost cost: my set will cost about half of what I thought it would (hope the guy I 'am purchasing from tonight doesn't read this..). Even when I f#$k up some mods, there are two spare p+c to try again, haha.
Using the 911 heads would involve a very major modification with pulleys to drive the ohc's and is way beyond my intent/capabilities/budget etc. Has been done though. There is a nice picture of such an engine in the photo gallery (its the engine with the carbon inlet trumpets and dubble injectors. It used to be a Kaefer Cup car, running in a special class, soon afterwards outruled).
Thanks for thinking along with me.
I'll keep you'll posted.
Walter
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