Welp, my lack of power is not an issue anymore. The intake valve on cylinder 7 got stuck halfway down, the piston hit the valve and bent it. So the engine is going to come apart so I can make sure everything inside is alright. My plans for the engine are a full tear down, install a Comp XE268H cam, port the heads and install 2.02 valves, headers and 850 TQ.
Glad you found the issue. What caused the valve to stick? Was there an oiling issue due to the rocker shaft upside down or was the valve to guide clearance tight. Tight guide clearance generally shows its ugly head soon on a new rebuild.
David Vizard for the mission impossible engine was looking to install Chev 2.00/1.55 LS valves. Magnum valves could work also with 5/16" bronze guides. The small diameter stems are much lighter.
If purchasing a new XE268H cam I would spec it with a 106° or 107° LSA.
I would watch some of David Vizard's porting videos. Yes many are pertaining to Chev or Ford heads, but the information can pertain to Mopar also. Listen to his nogo area and undercutting to unshroud the intake. I would purchase a sonic thickness tester to ensure you leave enough metal there and not make a water gyser.
With stepping up to 2.02 intake valves, degreeing the cam and checking valve to piston clearance is mandatory.
When porting his 289 Ford heads he shows cutting the scavenge plateau, to aid the exhaust getting pushed out the port rather than skipping over the valve head. Some minor appearing features that could be a great aid to inexpensive power.
