1969 C-10 Big Block/454 Heads (85-89 Open)

Hello, classic truck people!  I recently purchased a 1969 Camaro, which was alleged to have the original engine in it.  Imagine my surprise when it arrived at the shop for the rebuild, (of what should have been 396/325) when I discovered the block is none other an from a 1969 Chevy C-10 pickup big block, 396/310 HP which is for an L66, 10, 20 or 30 which would have had a 400 transmission.

It is a T0106YP assemble date (January 6, 1969);
Block casting is: 3935440
This block in in Ohio, near Akron at the engine shop, where my beloved Camaro is sitting waiting for me to find the correct engine.  I thought I would post here here before I put it on ebay.

Worth mentioning is that I also have 454 Heads (1985-89 Open for a chevy truck) which also came with my 69 Camaro.  14092360.  They are also for sale.

These need to go asap for two reasons.  1) Taking up space; and 2) need to reinvest the money in the correct block and heads.  Please feel free to pass this along.  Robin