MurphyEF

I have a chevy engine out of an 88' GMC 1500 (10054727 block from Canada). I am wondering if I have to replace it (everything is stock) with another 10054727 block, or can I use other casting numbers from other 5.7's? If I can use other casting numbers, do I have to stick to ones found in vehicles the same year or newer, or can I use a 3790010 block?

I apologize if this is posted in the wrong forum, This seemed to be the best one. I also searched, but with the combination of different casting numbers throughout the years, I couldn't really figure out a simple search term to specify my situation. Thank you for reading and I look forward to any feedback!

2wd-K5

after 85 the blocks all fit mechanically, the diference is the heads and intake, heads less so, use your existing intake and make sure you are using another 5.7