I tried the search but couldn’t find an answer for my setup. My car as the LG4 with automatic transmission but it’s a Canadian version. This mean non-computer controlled. The car is stock except for headers and full exhaust. Also as an open element and rebuilt q-jet (different rods and hanger) if this matters. My question is should I go with the comp cams 260H or with the 252H.

 

The XE cams, which have a bigger exhaust lobe than intake, run better in that motor.

I'd suggest the XE256.