i have a 87 z body that was a lg4 car,i happen to also have a 89 454 ,question is,will it fit? without mods? and 700r4 or 4l80? has anyone done this conversion?? it looks like fun!!!

there are tons of big block threads in this section, perhaps check out the search feature a little

pshhh big blocks thats yesterdays news were onto diesels now

LQ4/9 are the in swaps now



do a search there are lots of threads but yes and yes to your questions

diesel? pshhhhhh...THAT is yesterdays news. We are onto hydrogen fuel cells for power now

I'd rather fit a 455 in it, which I might kinda have. I think it should fit fine in my car...?

Yes it fits.. Mods are necessary if you're Gunna do it on the cheap.

Good headers like ed quays will make life WAYYY easier. Also Gunna need a built 700 if you plan putting some through it. I run a t56 in my big block 85 but its not cheap to buy parts that will handle the torque.

Also Gunna need a good cooling system aswell as the stock radiator ain't Gunna cut it with a big block. Also I would go aluminum heads to get the weight more around the range of a cast headed small block.

As what Steve said use the search at the top and a lot of swaps have been done.

If this swap wasn't so rare, we'd have a sticky about it in the top section of this forum.

Wait, we do have a sticky about BBC swaps into 3rd gens in the top section of this forum...

Also have a sticky about Pontiac engines into 3rd gens in the top section of this forum.

Quick answer, though - you can't do it "without mods".