While bouncing/browsing around on Ebay, Sprue Brothers, Squadron, etc,,, end up looking at He 162 kits.
Random whiff comes to mind. Because of SEA in 1960s there is a competition in parallel with the A-37. Emphasizing low cost, company X dusts off He 162 blueprints. Builds near replica in aluminum, installs subsystems of the time and installs same J85-GE-17A used in A-37. With crew of one and only one engine and similar performance, it goes into production for SEA service and as low cost counter insurgency export jet. South American allies are pleased with its faster transit to a target area compared with the T-28 and other prop aircraft. In US service the (A-162?) becomes low part of high/low mix of A-37B and A-162 like would later done with F-15 and F-16.
While He 162 has 2 x 20mm the A-162 could use same mini-gun as A-37B leaving room for sufficient ammo. Two hard points under each wing?
Thatz enough He 162 whiffing for one posting.