Does anyone know who sleeves dh-racing blocks and are they any good?? The reason i ask is b/c i bought an intake manifold/throttle body off of them and cant get rid of it so i'm hoping they will let me send it back and give me a good deal on a sleeved block. But i'm not gonna if they arent any good b/c i cant afford for a sleeve to drop or something.

 

anyone??