Have some big block # i need help with,
Aluminum heads #3919842,and a cast block stamped #T1108IT and the cast# is 3916321

The IT suffix on your engine code is for a 68 Corvette 427/430HP, M22, Holley, special high performance. The heads are the correct casting numbers for that engine also. If it is in your way a could probably find room for it in my garage.

Want to get rid of those heads?

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'69 RS SS 396 375hp L78 Convertible, M22, 3.31 posi, deluxe interior, gauges, rosewood wheel, AM-FM,fold down seat, tilt wheel, SS wheels, console mounted 8 track player, chambered exhaust
http://albums.photopoint.com/j/AlbumIndex?u=1169124&a=8603468

The heads are re-built with 500 mi on them possibly for sale what would they be worth?

Also the complete engine may be for sale it is in my friends chevelle 500 mi complete re-build

You have mail.