to match the lim ports with the heads you will take off enough material to get to .900x1.900 in. i used a dremel carbide cutter for the bulk of the cutting. i started using the small drum sander for the last portion to give it a nice smooth finish. i would give ur self @least 20 thou room for the sanding.

got one other question. Will any LIM from a n/a L36 engine be the same as the one Ive got or are there diffrent versions?
cause I was thinking that I should go to the junker & get one to mod.

A LIM from any Series 2 L36 will fit your engine. That'd be 95+ Bonneville, and 96+ LeSabre / Park Avenue. (For Grand Prix and Regal, it'* also 95 or 96+, not sure exactly the cutoff)

The only difference is that in around 99/00+, the EGR stovepipe in the LIM was reduced from 3/4" OD to 5/8" OD. If you happen to buy an APN UIM kit, it will have both sizes of replacement stovepipe.

I do still have a junked LIM you could have for practice, you just pay shipping (or additional shipping, as the case may be ):
http://www.bonnevilleclub.com/forum/...ic.php?t=83350

If you buy a Junkyard LIM instead, be sure to check it carefully for pitting and warpage on the LIM-to-head surfaces, and that none of the bolt holes are stripped.

took the car back to the mechanic, & lt turns out that the radiator had broken right in the middle. My mechanic says that is not fixable because the alluminum is rotting & is not worth it to weld it, becuse it will crack again. About the LIM he checked the oil & got the engine hot. He says that there is no coolant inside, that he knows is a comon problem with those engines to leak coolant internally. But that mine wasnt to the point where it was a problem.
I will change this regardles, but right now the main problem that I have is that my local Pontiac dealer wants $780.00 for a new radiator. Thats right, Isnt it funny?
So I have to wait till tomorrow when Ill know if my mechanic is getting a replacement that can get here in 2 or 3 days. If not Ill have to buy it in Miami & fedex it to PR.
at least Im happy it wasnt major.

Check out www.rockauto.com

Looks like they stock radiators for your car for like $130-$200 (not counting shipping).
Plus the 10% off discount code is posted on this forum somewhere...

You might also want to talk to vendors (or post a thread) about aftermarket options or squeezing a different car model'* radiator in there...I seem to recall reading somewhere that 00+ H-body radiators are a bit undersized.

Ok, I see to types of radiators one with a low coolant indicator, one without.
wich one is the one I need?

I don't really know.

This thread seems to indicate that 00+ cars don't have them:
http://www.bonnevilleclub.com/forum/...lant+indicator

But I think your best bet will be to look at your current radiator and see if it has some kind of sensor stuck in it (near the bottom, I'd guess).

I'd also suggest you be sure whether or not your current radiator has a tranny cooler in it or not. (Although either way, I would suggest adding an aftermarket tranny cooler)

Maybe others will chime in here...