my revo purchuse is it a 3.3 or 2.5r

[hailmick]

well two weeks ago i got myself a nitro revo and a horde of parts to go with it all it only has minor upgrades like Revo 3.3, Dragon Racing 23mm adaptors, 40 series bowties, (MONSTER) RB323, FOC & Crowdpleazer Body

the fellow states its a 3.3 revo but how can tell the difference between a 2.5 as their a traxxas starter motor thats says its a 2.5r
but their are parts that are unused in the parts lot like it has 3 radio boxes 2 starter wands numerous arms just to name a few

the aluminum pic hopefully gonna help me convert it either that or their gonna make for some esc mounts or battery trays
also sorry for poor pics