The "weird" heads are the ones that the exhaust manifold bolts are not in a straight line. They do not look anything like a passenger car or pickup truck head. A 213 head is a passenger car style head.

I have a pair of 213 heads that do NOT have the extra spark plug cooling holes and use the 3/8" reach gasketed plugs.

It is my contention that any passengercar type head with a matching passengercar type gasket will work and cool properly on any B/RB block. I do not believe any scare stories about the presence/absence of spark plug cooling holes making cooling problems.

R.