273 Bore Taper

Hey Guys,

I've got a used 273 short block in the back of my garage begging to get back into service but it's condition is mostly unknown. It has almost no ridge at the top of the bores (just a little bit of carbon build up, not enough to catch a fingernail), but haven't measured the bores yet. When I do, what's an acceptable taper to just dingle ball hone and reassemble?

I've got some good surfaced heads ready to go with the short block to replace to tired 318 in my '66 Barracuda.