AJ's Opinion; what size SBM do I need

2800 on a 318 is like a 2" pecker for a Las Vegas hooker. It ain't a match. Stock Chrysler converters, unless they were a factory low stall were in a range of about 1500-1700. Factory high stalls were about 1000 RPM higher, so you "could" have had a 318 with a 2700-2800 stall factory, so a 2800 'taint chit. Especially considering today's modern converter technology where you can have a converter flash to 5000 RPM but be tight enough to drive everyday on the street and not slip like a banana peel. Especially with a small cube, short stroke engine that's gonna like to rev, I recommend nothing lower than a tight 3500. If it was something I was building for "ME" it'd get one about 4200.