Rear Casing number 14015445
Date code J208
Front Number T1O079XF

It decodes as a boat motor....


Rear Casing number 14015445
1975-87 Light duty 454 truck usage and marine.

Date code J208
J - October
20 - Day
8 - 1978

That weird, they machined it before it was even cast. Must have one of the dates incorrect

Front Number T1O079XF
T - Tonawanda
10 - Oct
07 - Day
9XF - 1979 Marine engine 454-245 hp LF8 with 4-bbl carb.

Any Problems with Marine blocks?
Are they better or worse for Street applications?

Thanks for the Decode.