hey can someone help me fugure out what these numbers mean on that last pic?

 

where the firewall meets the floorpan

 

That's easy enough... Pull back the carpet, and use a cold chisel or spot weld cutter to remove the center bracket.

The only difference between split rear/solid rear is the additional pivot for the split seats in the middle, and on early cars the addition of the passengers side latch for the seat back. Early solid rear seat back cars only have the latch on the drivers side.

What do they say? They aren't very legible in the pic.
There should be two rows of code. The first line tells you a few details about the engine and car it might have gone in. The second line is a partial VIN of the car it's from. You'll have to google the code to get a definition either way since there is no list here.

87-up heads with centerbolt valve covers won't leak oil as easily as earlier heads, but 82-86 heads are generally considered better for performance. On an otherwise stock 305 it probably won't matter much, as long as you're using HO heads. The original heads from your car would be better if they aren't warped.

 

v12235da is the only row in that spot

 

Take a picture of the seat mounting points, I am kind of thinking it should bolt right up, but I haven't seen a split rear seat so I don't know.

 

Like Drew said, the seats will bolt right in. You can chose to remove the center bracket, but it isn't necessary.

 

http://www.nastyz28.com/sbchevy/sblock.php
http://www.nastyz28.com/chevy-engine-code-stampings.php
http://www.73-87.com/chevy_ids/sbcid2.htm

 

those sites completely contadict the cast numbers... tryin to say its a 67 or 68 motor with a 3 speed manual but the cast numbers are saying 87-91

 

Sometimes casting numbers can be hard to read. Get yourself a wire bristle brush and a can of carburetor cleaner. Spray, scrub, spray, scrub, when it's really clean get yourself a nice bright light and try reading the numbers again.

 

what i'm saying is the suffix code is da, which can't be right and i know for a fact the casting numbers are

 

14101081 head number