Once again, I'm tormented by the urge to get a set of PEMs for my L27...
But is it really gonna give me a gain that'* worth the $ and effort involved? :?

I would do it. But I'm also the village idiot who spent over 2Gs on L36 bolt ons.

It won't hurt your car, that'* for sure.

For $80 you can just have them porting and if you want light grey ceramic coated another $60 ($140 with your cores + shipping).
Hulkspeed is almost another whole bill ($$$) for the same, but their advantage is a wider selection of ceramic colors.
Is it worth another $100 (maybe not quite that much) for a color -that'* for you/consumers to decide.

I probably would just get them welded/ported & cheapest ceramic coated [gotta keep those exhaust temps up! ], but I guess my main point is: it'* a L27, how much of a difference would it make with my current mods...I realize that if I put lifters in and/or put a cam in, then it would be well advised to put in PEMs, but with my current mods, what can I expect to gain? :?

You mean rockers.
I think they would wake the car up a little bit. But by how much, I have no idea. You would be the first FWD L27 to do it IIRC.