got a 4.8 block from work today for next to nothing, i plan on putting it in a s10, its a seasoned block so how much should i have my machine shop bore it out safely? normally with other things i go thirty over but that seems a bit too much for this, im scared to go to much because of how thin the cylinder walls are.

 

i'm pretty sure you can go that much over safely. what exactly do you plan on doing with it is the question.

 

You can go to 3.898

 

thats ls1 spec isnt it? and i dont plan to make it a all out race motor but i do plan to make it strong and drivealbe for the street, if i go thirty over on it, should i go ahead and go with a ls1 crank or see about having the one in it machined a bit? either though i dont want it to be an all out race motor i want it to be stronger than the average 5.3

 

make an iron block ls1.

 

The 4.8 shares the same block as a 5.3 and 6.0 IIRC. Just make it an iron block ls1 like Taco guy said.

 

HAHAHA

6.0 block is different. 5.3 and 4.8 are the same. bore it out to a iron 5.7

 

Got it coach, I couldn't remember if the 6.0 was different or not. Thanks for clearing that up.

 

No problem!

and i was laughing at the taco guy comment, if you were wondering...

 

i wish it was the same as the 6.0 block