just picked up a 67 c10 farm beater

[vern650]

just picked me up a '67 c10 small window farm truck for $300. its in pretty rough shape but i figured for the money it would give me something to tinker with. it appears to have been a v8 truck converted to a l6 being that the engine stands are in the front holes(my understanding l6 stands are in the rear holes) and the front cross member is notched to clear the crank pully. the motor appears to be newer as it has egr and the ignition looks newer.

i was wondering if anyone could tell me what engine it has if these are the right numbers:

348675

i believe D255, not sure on the D this was behind the dipstick.

and last number i could find was either C or G then ON2

also could anyone tell me what trans it has, it is a 4 speed manual with reverse towards the driver then down. all the 70s chevs i had had reverse towards the passenger then down and granny first and i believe those were the SM465 if im not mistaken. the trans has about 2 inches of crap caked around it so finding numbers will be difficult.

thanks

p.s. dont mind the happy garbage can.