Hello, J body enthusiasts! I have been on a quest for a couple hours now, and answers seem to be almost nonexistent! I believe my thirst for this �forbidden� knowledge started with a Facebook post about a J2000, where I learned that some J body cars in the 80�s (and some other GM cars from the 70�s-80�s) got a strange engine option; Opel derived four cylinders. After I read that, I figured, hey, let�s figure out what bellhousing pattern these �family 1/family 2� engines have.

That�s almost as far as I got, because who knows! I have discovered that Opel and Isuzu designed the Chevette together, and that a T5 transmission from a Chevette bolts up to an Opel GT engine (foregoing the top two bolts on the engine), and the Chevette used an Isuzu engine- the G161z, available in all �t� body cars. The engine In an Opel GT being a 1.9 �cam in head� engine.

That�s it, that�s all I�ve gathered! I can�t find any more information on the subject. So I�ll bullet point some active questions below.

- Do the family1/2 engine from Opal use a common bellhousing pattern in all applications?
- Do those bellhousing patterns match the Opal �cam in head� engines?
- Does the bellhousing differ in from wheel drive vs rear wheel drive applications?
- Does the Isuzu engine from a Chevette share bellhousing patterns with other Isuzu engines?
And many other questions, I�ll take whatever answers I can get. What will these answers get us?

- if it is proven that many Opel or Isuzu share bellhousings, it can open up many swap options not just for J cars, but all cars!

That�s it! The only reason we need! That�s what I�m after, is good swap information. I�ve learned that Isuzu and Opel had some hot, hot engines in comparison to our mostly lackluster options here (2.2 ohv? Snore. Quad four? If you have a matching bellhousing!) However, with some good info on these bellhousing patterns, we can find out not only if we can swap a turbo engine (Opel, or Isuzu) into a J body, we can find out if we can swap them into anything! (Turbo Isuzu S10, anyone? Hell with a v6!).

If you�re really curious why I�m wondering about this, it�s not about J bodies (but it is- some J bodies had Opel Drivetrains), it�s about not being limited by American options. You know, the typical �I wanna swap my Fiero�s Iron Duke- do I go underpowered v6, big �ol v8, or what?� Situation.

So- anyone here a Guru with Isuzu bellhousing patterns, or Opel bellhousing patterns? Anyone able to take measurements and make a quick sketch? Let�s uncover the info we can�t find, to make a more fun world for tomorrow.

I've got nothing of value to add here but applaud you for doing something interesting.

I hope someone here can help!