Very similar rules to what I had to build around. Build it like a NHRA Stocker. Maximize the effect of every area you can. The valve job is a critical area as well as cam selection and rocker geometry. That type of rocker arm can change what the valve sees off any given cam profile if "each rocker" isn't setup properly. After all the allowed milling the timing belt must be adjusted to put the rocker action where it needs to be. Working with the cam C/L is ok, but I ended up working with the actual opening and closing points of the valve action. You can put the C/L's where you think they should be and find out the rocker setup is altering the actual opening and closing points. The shape of the bowls and the valve job are just like a NHRA Stocker, critical for flow. I spent many hours on the flow bench with some spare heads that were sacrificed. Flow the head with the intake. I believe there were 2 ports that ended up with just a little different shape/angles in the valve job to increase flow. The last angle at the SS Radius is very important. Don't give up low lift flow for high lift flow. Build a flow curve that is healthy at mid lift. We were allowed to put in a stock diameter Stainless valve in place of the poor quality stockers. The back side shape of the valve was an area that can help flow at low and mid lift. I also offset bored a couple of blocks and they seemed to work well as well as hold up. At the time I didn't have a sonic checker so I can't tell you how thick the bores ended up. Sitting here typing this I had a thought about the fuel. When I did these I found out they were not prone to detonation and didn't need high octane fuel. I'm now wondering how they would respond to E-85..?? I worked on these many years ago...This is really digging into my memory bank...I've enjoyed remembering the past. :~) Good luck with your project.
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