kh art ▁car . ▁Pra irie ▁Queen ▁tra ctors ▁also ▁used ▁this ▁engine ▁in ▁ 1 9 2 2 . ▁ ▁Autom ob iles ▁ ▁In ▁ 1 9 2 1 ▁Frank ▁L . ▁K ling ens m ith , ▁William ▁Black burn ▁( from ▁Cad illa c ) ▁and ▁Frank ▁F . ▁Be all ▁( from ▁Pack ard ) ▁took ▁over ▁the ▁Gray ▁Motor ▁Company , ▁ren aming ▁it ▁Gray ▁Motor ▁Corporation ▁with ▁$ 4 ▁million ▁capital , ▁with ▁the ▁intent ▁of ▁compet ing ▁with ▁Ford . ▁Two ▁models ▁of ▁Gray ▁car ▁were ▁made ▁using ▁the ▁Be all ▁developed ▁Z ▁motor . ▁The ▁Z ▁engine ▁was ▁a ▁ 1 2 - 1 8 ▁horse power , ▁ 4 ▁cyl inder , ▁L - head ▁design ▁that ▁was ▁said ▁to ▁res emble ▁the ▁model ▁T ▁Ford ▁engine . ▁▁ ▁By ▁ 1 9 2 4 ▁the ▁company ▁was ▁in ▁poor ▁financial ▁condition ▁and ▁Mul ford ▁managed ▁to ▁buy ▁back ▁the ▁marine ▁engine ▁division , ▁re - est ab lish ing ▁Gray ▁Marine ▁Motor ▁Company . ▁Gray ▁Motor ▁Corporation ▁ceased ▁producing ▁cars ▁by ▁ 1 9 2 6 . ▁ ▁Marine ▁Eng ines ▁ ▁The ▁marine ▁engine ▁division ▁continued ▁operations ▁for ▁over ▁forty ▁years , ▁and ▁is ▁most ▁known ▁for ▁converting ▁autom ot ive ▁engines ▁for ▁fish bo ats , ▁cru is ers ▁and ▁World ▁War ▁II ▁landing ▁craft , ▁such ▁as ▁the ▁Canadian ▁R amp ed ▁C argo ▁L ighter ▁and ▁the ▁f amed ▁H igg ins ▁Bo ats . ▁Gray ▁built ▁their