Managed to score some old a12 blocks and was told that one of them may be a gx block but not to sure the bloke i got them off use to be a datsun enthusiast and is where i got my gx head off so ill throw up some pics the 2 blocks are definitely different..

here are the pics the one with the sump i have been told is a gx

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Only one pic of the sump one but block should be same gx or not.
That top one looks like a late a series block with dizzy under cyl 3

just added a better pic sorry forgot to add it beforeQuote:

GX Block would have flat tops, front dizzie and a unique water pipe into the side of the block. Yours has dished pistons, front dizzie and the water pipe has been cut short.

A12T had dished pistons but the dizzie was mid mounted.

Apart from that, unfortunately there isn't much more to prove that it is a GX block as they didn't have too much extra.

tinnie anchor at best

So no good im guessing haha spewingg

GX block is the same as regular 1200 block. GX came with dish pistons or with flat.

1. Is an M22 block, newer style

2. Looks like M08 block

So i have a new style a12 block and a block from like 1973 older style with front distributor?

Yes