Type 4 in P 996

[MrBeanCar]

I've been wanting a 912 but they've gotten pricey. And considering all the 996 engine problems, what would be the downside/issues with a Type 4 engine transplant into a 996 ?
Lower power for sure but that is part of the 912 charm.

[Golten951]

Over all. the weight difference between the 912 and the 996 will hurt your performance, fuel MPG, and getting everything to function with the Dash will be a lot of work. would be a simple engine, Have you considered a 997 engine?

[Andy Somogyi]

I would avoid the type-4 engine like the plague. It is an insanely expensive engine to build, almost as expensive as complete air-cooled flat-6. To get the type-4 reliably even up to 150 hp, you're going to spend about $15,000 in parts alone. Then add machine work, cost of adaptor plate, ...

You can build and M96/M97 much cheaper than a type-4, and the M96 is a great engine. If the M96 cost is still too much, you can swap in a Subaru turbo, or even look into something like a VW R32 engine. The nice thing with the R32 is it's the same bell housing bolt pattern, so should bolt up.

I've got a 76 912, that after some serious research into all the engineering options, I've decided on a 'stealth' Subaru flat-4 swap, with hidden radiators. I'm going with a built N/W subaru in mine for a variety of reasons, but mostly that it's light, simple, lower cooling requirements than a turbo, and I think just looks good.

Here's the look I'm going for.