Thank you guys for the input.
My friend has decided to leave this motor in the car,he figured why waste all the money and time to take this motor out and then find an LS6 motor and components when in the end it will still be a non matching motor car just the same.
but it would be still interesting if someone can answer the original question of this thread.
...Vin# on the pad near the oil filter which reads 10S189855 which breaks down as 1=Chevrolet 0=1970 S=St.Louis plant and 189855 Vin# (to which Chevrolet model would this motor belong to?)
1-i am pretty sure that 1970 Chevelles or Monte Carlos were never built from the St.Louis Plant so there out of the picture.
2-also the Vin# is to high for a 1970 Corvette.
3-does anyone here have a 1970 454 Impala to share the Vin# so i can compare it to the above one.