Hoops, I have a set of Brad 5 fatheads with hoops, I have a KB Stage 4 solid block, that the sleeves were originally cut for reciever grooves of the stainless wire variety. Had the sleeves cut to accommodate the hoops per a manufacturer dimensions and I still have an issue that there isn't enough silicone on the planet to seal. The heads and block surfaces are strait and true. I mocked it up, only torqued it to 50lbs with dykem on both sides of the gasket looking for answers. Used a .050 gasket rationalizing I had them and will probably never use them so make some use out of them. I know what sizes I'm looking at as far as depth width etc... but want unbiased opinions of what you use as far as reciever groove depth, width, and how much sleeve you have above the deck. I'm a machinist by trade myself. Northeastern Oklahoma isn't exactly the hotbed of modern hemi development, so help me out here please. Tired of taking this thing back to the machine shop. Already wasted 5 months and most of this season.