LS coils - LS2 vs LS3 vs LS7

[BA.]

I've been searching forums quite a bit on this coil topic but still can't seem to tell whether the LS3 coils are different than the LS7 coils.

I realize that the LS1 coils are not as good, I realize that the truck coils are a little bigger, but have some heat disapating feature...either way I probably won't use truck coils.

So that leaves me with LS2, LS3 and LS7 coils. I think the LS2's are slightly larger than the LS7 coils. I'm unsure how the LS3 coils compare.

Should I consider an LS3 coil on my LS7?



These are a damn site cheaper than $660 from SDPC so you can see why I'd ask.
http://cgi.ebay.com/ebaymotors/LS1-L...item27acda7ba2