ford did try in 69 with the BOSS 429,hemi configuration.limited sales,and the expense of the motor and its development,prob led to its demise.chevy tried too,their was a smokey yunik built( i think)302?or 307?cross ram hemi,that was put in a 68/69 camaro,but never worked out.

OWNER OF EVERYTHING FROM 1956 300 B,IMPERIAL,NEW YORKER HEMIS,AND NEW HEMI TRUCKS.....5TH GENRAMS.COM... 1969/70 ROADRUNNERS ,DARTS/CORONETS, NORTHEAST HEMI OWNERS ASSOCIATION.....WWW.PHANTASMCUDAS.COM....MOPAR FAMILY FOR 50 YEARS AND STILL GOING!MOPAR OWNER COAST TO COAST!!!!