trying to install my '73 400 into a '86 c 10 . it was in a '69 tempest . the engine and full detent trans. survived . built it in'84 and recently refreshed w/new bearings valves etc. trying to put torquer into a '86 chevy c10 . my lemans mounts are close but i heard '74 firebird mounts go right in. anybody out there ever do this ? got tci streetfighter/bop adapter for 700r4 . thanks for any help