Help need a quick ID for a block

[DanMcG]

I've been looking but can't find anything on the block
400ci 3951509
T77518541
F0317T? S

Any help would help.

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[DanMcG]

ok how about a good guess

I'm thinking flint, 3/17 but the "T blank S" suffix has me stumped for starters

 

[legopnuematic]

Im thinking 1977 Fremont for the partial vin
Maybe TLS? Matches for a 77 400, 175hp

 

[DanMcG]

Thanks Lego, I think you're correct!
I've been looking at numbers for days and still can't figure out the T77518541, it seems to have one extra digit compared to what I see on the net.