The L67 is in WAY more cars than the L32.

The only hard part is getting one that isn't that high of a mileage. Also check out MoradPartsCompany.com for engines.

 

They do have a little bit of aftermarket now, there are some shelf stock ported heads and aftermarket cam's; but I totally understand where you're coming from. Thats why I did the L67 swap in place of my 3100- at that time, guys were spending tons of money and doing tons of work, just to get up to stock L36 level, and I didn't want to deal with that, not when guys were running 12s and quicker with regular shelf stock mods on an L67.

What do you mean? You have a lot of custom work done to it that you couldn't transfer over?

The thing to understand here is that they are virtually the same engine (a lot of the early L32 engine blocks still said series 2, and I remember some even got the old cast rods too. The only worthwhile difference between the L67 and L32 is in the supercharger. The L32 uses the newer "gen 5" eaton M90, whereas the L67 uses the older "gen 3" eaton M90. Basically, the gen 5 works just about as well as a ported gen 3.

The L67 has the upside of being much much easier to find, aside from the 04+ grand prix supercharged's, every other supercharged 3800 vehicle came with the L67 (meaning the impalas, montes, buicks, and even the grand prixs before 04). The L67 will also be easier to swap. You can always easily swap the LIM and blower for a gen 5 later on; or you can have a gen 3 ported to practically gen 5 levels.

The L32 has the upside of the better blower, but they tend to be more costly due to being in fewer vehicles. However, they came with a returnless fuel system (meaning you'd have to switch to an older, return style rail)- and they came with electronic throttle bodies (meaning you'd have to install some sort of cable driven TB- either an L67 one, or a N* or LS1 TB- all using an adaptor plate).

I'd say take what you find in terms of lowest mileage, lowest price, and closest distance. If you find an engine you like that meets your criteria, I'd grab it regardless if it was an L67 or L32.

$3k for an L67 is crazy crazy steep. Years ago, I bought an entire totalled grand prix GTP (1998- it had like 60-70k miles) for $1500- and that car could have been repaired to a driveable car for less than another $1500 easily. Also, keep in mind the price of used GTP's nowadays- 97's and 98's are close to $3000 for a running car (granted you're looking at 100k+ miles)- but that really makes spending $3k on just the engine kindof insane. I'd look to pay no more than $1500 for a complete powertrain, engine alone shouldn't be much more than $1k- unless its crazy low mileage.

clubgp's classified section is a good place to look (thats where I found mine)- also ed morad is a good guy too (they deal pretty exclusively with gm FWD stuff)- but prices are a little higher than if you find it yourself on the forums.

 

Does there come a lot of tinkering and modifications that need to be done with swap from 3.4 to 3.8? In monte carlo Ls 2003?

 

i believe theres new pcm, wiring harness, the motor mounts may be different also, and then theres modifying the air intake unless thats included, but that would be the easiest part.