engine ID

[Larry Moeller <elmo@inreach.com>]

i just opened up a 1800 5-main i bought from a wreck a few yrs ago &
need some help ID'ing the parts:  Crank is cross drilled & balanced,
stamped " 1875 REX Race Eng"; cam has # H374 on nose, bore is 040.. (car
was a GT in Sacto CA area but was not Yarwood built).   Anyone recognize
these & have any help on the possible builder & on the cam make &
specs?  (it ate the lifters.. otherwise engine shows very little wear)..
it is going into my  B vintage race car.