No problem, The main caps are Milodon four caps. They were pretty easy to put in. I did all the install back in 2004 besides doing the align hone a local shop did that. The biggest thing that on one seamed to say anything about was the stud on cap number five under the oil pump. This was a major task. When I first started putting this thing together the instructions right from ARP said "Most will not be able to use this stud under the pump so use a stock bolt instead." So I chucked that thing up in my mill and took off about .250". Then called ARP and had them make a stud that fit it was still slightly to tall so I had to wet sand it "NO HEAT" to get it to size.
The CNC took every bit of visible hand work done. As far as flow numbers the Indy website say 330cfm at .700 lift. When I got my heads back the gave me a flow sheet saying that at .700" lift they flowed 346cfm. I always check everyone's work and took them to my buddy's shop and had them flowed, every port was checked for the uniformity. All of them were within 1% of each other and the lowest 358cfm and the highest 361cfm. Not bad for just chucking in a machine, pushing a button and letting it go. But here is the funny thing we found. at a lift of 0.715" the flow number started to go the other direction or get less. not until 0.792" did it pick back up again. Crazy. I have a total lift now right around 0.700 or so lift so I should be fine.