i got a 360 with a 40 over bore.....

octanejunkie said
Hopefully I am not overlooking something, but YES you can use a 4.060 bore gasket on an 4.040 cyl bore

a basic fel-pro 340/360 head gasket will work.. 360 =.040 over = 4.04 bore, same as a std 340, but the 360 has the longer stroke.