Originally Posted by
ksoc
My understanding is that for a proper Tamiya Easy Eight, you need a different Turret (T23?) 76mm Main Gun and mantle, vented (grills) engine deck, and an exhaust diffuser..... though I could be wrong

Correct. Technically you need to alter the angle of the rear upper hull as well, as the M4A3 slopes more than the M4 does - Ethan has done this on his builds, unfortunately I was less educated about the differences back in 2010 when I built mine tho