The egr intake can be used, but I wouldn't use anything other than a Q-Jet on it. It's just you are giving up alot of power with it. For this type application, I know what worked best for me was the RPM intake. Since this is going in the T/A, then might even look at the air cleaner assembly from Larry (WFO) who is on the forums here just for the clearence under the stock hood and still look right.
Your current rocker arm studs are a press in style. Under higher lifts and spring pressure that goes with that, the stud can raise up out of position. Screw in rocker arm studs once in laced and torqued, stay put, there by not being a loose rocker arm issue later like a press in stud will be. The hole needs to be tapped for the threaded bottom on the new studs. On Pontiacs, the bottom is already a 7/16" dia., even the press in style. The studs you need are either a 1/2" bottom or you can get thew holes reamed/threaded for a heli-coil set up as some do for a 7/16" bottom also. The ones listed on your link is for a stronger factory replacement style ARP that has a 7/16" bottom.
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