ProComp/Speedmaster aluminum heads

The “affordable” BB heads that have straight plugs are Stealths, and the 84cc E-Street.

In the past, SM has had the RPM style head in both straight or angled plug versions...... but I haven’t seen them on their site in a couple of years.

The pic posted above looks like the Victor style head.
Those take a few special parts to be able to run them.