360 cam question
if it's stock pistons, I'd probably look more at the XE262. had one in the 360 in my old 5th ave. had a bit of an idle, but not a ton of chop, had good manners with the 3.55/27" tall tires in a 4000lb car with a 42RH, which made highway cruising about 2100 RPM@ 70mph