70 BB chevelle block no.

[michael harris]

my 70 LS-5 chevelle has the no. 102251 SD stamped on the block.can anyone tell me if this is the original block for this car.I believe it was exported new to australia.vin 136370L186005. ST 70-13637 BL 08104 ************* TR 756 55 55 ****************04C 656786 200021.options are auto,a/c,p/b,p/s,3.31 posi,buckets,cowl induction,ss wheels,gauge package,p/windows.any help would be greatly appreciated.

[Stefano]

The block casting number for all 454 1970 Chevelle LS5 OR LS6 is 3963512. It is located at the rear of the block on the drivers side. You should also see a casting date just off center of the block in the same region. The casting date should preceed the build date of your vehicle.

[MAS]

your 102251 block is a late model 1990's GM block used primarily in truck applications.

[michael harris]

I have found the original build sheet for the car(a bit moth-eaten).The car has about 38 options including p/windows,B96,F41,G80,G94,J50,JL2,M40,N10,N33N40,U63 ,gauges,A/C,(can't read them all plus ZL3 SS396 conversion option so i guess it was originally a 396-350HP(ac-labels).It was built at the van nuys plant and charged to Brooks Chev in San Francisco.At the bottom of the build sheet it reads eng. no.TW,axle no.CF,date 4,trans no.CF,OPTIONS 113313.can anyone translate this info. and the nos from id plate from my original posting as the car is in as new condition and i would like to bring it to as original as possible.the vin no matches the build sheet vin no.