You can put a 4 cylinder Chev head on a T with an adapter plate. The cylinders do not quite line up so the plate has sloped openings to make thing work. The later 4s have 2 exhaust ports & work much better. 28 was the last pre war 4. The first thing to check if you find a head is for cracks inside the exhaust ports.
Chev 4-cyl overhead valve heads will mount to T blocks with an adapter plate. This installation was discussed in detail on the HAMB site and AACA forum. Did not read to far because I like them stock. Good luck.