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bruceman1968 · 04-17-2018, 07:31 PM

Bill, are you looking on the bellhousing mounting flange? Opposite side from where you found the Casting number(3999289). Sometimes it could be on the same side.

You really don't need the date code at this point. Your block is either a 73 or 78. Go back to the pad where you found the T0106TRK number and see if there are any other numbers there. like 18Z100001. If there are NOT any other numbers there, your block is a 1973. If there are more numbers there, your block is a 1978.

04-17-2018, 07:31 PM	#13
bruceman1968 Registered User Join Date: Oct 2009 Location: Tampa Bay Posts: 1,549	Re: 454 date code year of manufactur Bill, are you looking on the bellhousing mounting flange? Opposite side from where you found the Casting number(3999289). Sometimes it could be on the same side. You really don't need the date code at this point. Your block is either a 73 or 78. Go back to the pad where you found the T0106TRK number and see if there are any other numbers there. like 18Z100001. If there are NOT any other numbers there, your block is a 1973. If there are more numbers there, your block is a 1978. __________________ CHEVY/GMC VIN DECODERS Last edited by bruceman1968; 04-17-2018 at 07:43 PM.