Comp cams xe268h for 318

Dart they make ridge reamers to take the ridge out
just don't go too far :)
as said way above check the taper
Taper within spec try the hone
taper outside spec save grief and bore it
I didn't cut the ridge in my 273. 100,000 miles and the pistons came out without breaking a ring. There was some taper so I had it bored.