Model A's are 200 CI (~3.3L). I ran a Model C 4 banger in my Model A pickup - higher compression, larger journals, and counterbalanced crank. Outran all the guys running stock Model A's.

Model A's had a HUGE flywheel (maybe 40 lb), but I ran a cut down flywheel in my Model C engine.
Also had a 4 cyl Dodge minivan that had a balance shaft in it. It was a POS.

Evan, that hotrodded Model A engine is barely recognizable as a Model A. The timing gear cover is the giveaway. Looks MEAN!