Originally Posted by 67 Deuce 4 Me
If your going to all the trouble for more power why not put a caddy north star in it! Ive seen that done before in a magazine, looked fairly easy. Would be a tight fit an a grand am, but so would a 3.8.
The 3300 the factory installed was tight but it has the same external dimensions as the 3800 and it fit, the Northstar is HUGE compared to a 3800. I've seen pictures of them swapped into a W-body (Grand Prix, Cutlass, Lumina and Regal) and there was some cutting involved and it was REAL tight, putting one in an N-body (Grand Am, Calais, Acheiva and Beretta) would require major surgery. I seriously looked into swapping a Cadillac 4.9 into a Grand Am and I used a friends 3300 powered Grand Am to take measurements from, it lacked about an inch on the passenger side of fitting without cutting out half the inner sheetmetal and it was real close front to rear. While scoping out 4.9's in the local yard I did a lot of comparison to the Northstar and it is noticably larger externally than the 4.9, requires a lot more room front to rear and would also require major modifications to the cradle. Then you would need to swap in the 4T85E transaxle to go with it if you had any hope of keeping a tranny behind it and your into more floorpan mods, custom axles, suspension mods and on and on............ The 3800 can be put in with mostly factory parts and no cutting required. Keep in mind though the 3300 is a Series I, in '95 some 3800's were Series I and some were Series II, the Series II might have some differences that would preclude using mounts and brackets from a 3300, something to look into before choosing your engine.