Gen-I/Gen-II Same Block?

[Canyonero]

Quick question - I have a Gen-I 2.8L long block that I have been using for mocking up my motor swap, but I'm actually going to use a Gen-II 3.1L from a Z24. Granted I haven't done all that much yet, but I've been going on the assumption that the blocks are externally interchangeable. Is that correct? I have not pulled the 3.1L yet as I like to have the donor car drivable until I'm actually ready to use the engine.

Need to fab motor and trans mounts soon.

[Superdave]

No, the motor mount pads are different.

[Canyonero]

Nooooooo! How different...

[Guest]

Very different on the driver side (longitudinal reference) and quite different on the passenger side.

[caffeine]

My friend has made RWD mounts for a Gen II and they weren't too bad but definitely different compared to a Gen I.

[Canyonero]

Could I make a motor plate that would fit a Gen-I FWD and RWD, and Gen-II? This is for a LeMons car, so if I need to get a replacement engine in a pinch, it would be nice to have my options open. I know 2/3 bolts line up between Gen-I FWD and RWD. Wondering if I can just pre-drill, slot or oval the holes to fit Gen-II as well.

I think I'm best off sticking with Gen-I/II to keep the RWD steel oil pan for clearance issues. I can't box my subframe because of the transverse leaf fron suspension.

[geoffinbc]

He has a Trooper so his actually uses a FWD block like a Lumina APV van. Gen I and II mounts are the same in this respect.

[Canyonero]

He has a Trooper so his actually uses a FWD block like a Lumina APV van. Gen I and II mounts are the same in this respect.

Yes, that was exactly my assumption. My Gen-I long-block is from a Trooper, and I was pretty certain they used normal FWD blocks. I have a 3.4L Gen-I RWD in my Trooper now so I know the differences between those two.