, ▁made ▁up ▁of ▁five ▁ 4 . 1 2 ▁lit re ▁disp lacement , ▁ 6 - cy l ▁L - head ▁car ▁engines ▁( block ▁up wards ) ▁m ated ▁to ▁a ▁common ▁c rank sh aft , ▁disp lacement ▁ 2 1 ▁lit res , ▁ ▁at ▁ 2 , 7 0 0 ▁r pm . ▁Side ▁doors ▁elimin ated . ▁ 1 0 9 ▁built . ▁M 3 A 5 ▁( Gr ant ▁II ) ▁T win ▁G M ▁ 6 - 7 1 ▁dies el ▁variant ▁of ▁riv et ed ▁h ull ▁M 3 . ▁Although ▁it ▁had ▁the ▁original ▁Lee ▁tur ret , ▁it ▁was ▁referred ▁by ▁the ▁British ▁as ▁Grant ▁II . ▁ 5 9 1 ▁built , ▁some ▁with ▁UK ▁Grant ▁tur ret . ▁M 3 1 ▁T ank ▁Rec overy ▁Ve h icle ▁( Gr ant ▁AR V ▁I ) ▁Based ▁on ▁M 3 ▁ch ass is , ▁with ▁dummy ▁tur ret ▁and ▁dummy ▁ 7 5 ▁gun . ▁A ▁ ▁win ch ▁installed . ▁M 3 1 B 1 ▁T ank ▁Rec overy ▁Ve h icle ▁Based ▁on ▁M 3 A 3 . ▁M 3 1 B 2 ▁T ank ▁Rec overy ▁Ve h icle ▁Based ▁on ▁M 3 A 5 . ▁M 3 3 ▁Prime ▁M over ▁M 3 1 ▁TR V ▁converted ▁to ▁the ▁art illery ▁tra ctor ▁role , ▁with ▁tur ret ▁and ▁c rane ▁removed . ▁ 1 0 9 ▁vehicles ▁were ▁converted ▁in ▁ 1 9 4 3