chevy block number 10054727 found on back of motor behind drivers head.

engine suffix code i found on passenger side front in front of head was
K1101UZA.

the guy i bought it from told me it was out of a 1991 truck. he has a 1991 gmc 1500. i am unable to find the info about this block through google. the suffic code told me it was an early motor from 1970s- 1980s but the block casting indicates a 1987-1995 block. thanks for the help
matt

 

Check this LINK
Suffix code looks like its a 1981 chevy 350.
No dice on the block number so far though.
But the block code comes up as an '86 or newer 2 or 4 bolt main.
Check this LINK

 

oisinirish is right, all i find is it's a '81 casting, but some boards are saying it's a '86 to early '90 casting. and the "K" references to being built in Canada. i passed the info along to a good friend of mine (crazy Chevy engine builder), i'll let you know what he passes back to me.

 

thank u both very much and ya i was getting the yrs of like 87-95 for the block casting. but the suffix code had me lost because i did see the ealry 80s as well but that cant be since its out of a 1991 gmc 1500 and the block casting of 87-95 so im confused. im glad i found this forum on google all of u have the best info and great knowledge. i am very handy with my hands as i have never really worked on chevys other then the 2 months i was in hot rod u at uti aka universal technical institute auto trade school. then i went to dodge and built thier transmissions for a yr before joining the navy. so thanks all for the help.