M96 Frankenstein?

[ike84]

Everyone's asleep so I decided to stare at the pet pdfs for a minute. And something struck me ... There is a ton of overlap between the 2.5, 2.7, 3.2, and 3.4L motors of the early cars

This makes sense to me - Porsche is on the verge of bankruptcy so reuse as many parts while still offering variety.

The crank rods are the same across all models. The crank cases have different part numbers though. Is this because the different cases and heads have different bolt patterns?

Obviously the cases halves are different, but only by bore. Again, maybe bolt pattern?

Heads have different part numbers but at least the valve guides and cams of the 3.2 and 3.4 are the identical. Again, is this just a difference in bolt patterns?

My brain naturally went wild with this thought - Scavenge together a 3.4 from different parts ( crank and bearing set from any motor other than a 2.5, any rod set, 3.4 Pistons, 3.4 case halves and heads, and then valve train from a 3.2 or 3.4). Or better yet, instead or trashing old 3.2s for a 3.4 swap, just rebuild the 3.2 with 3.4 case halves and Pistons for a few grand.

Has anyone done something like this before?

Has anyone ever held all these pieces of in their hands to know something that I'm missing?

I must be missing something here...


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