Used them....Eddie ran better. Engine runs good to about 1800 but goes flat after that....just runs like a low power 318...seems to have trouble breathing up higher..
Going flat at 1800 could just be where the torque converter is trying to stall with whatever torque the engine is producing, and the engine is then starting to see a real load on it and bogs down.
With a retarded cam, the exhaust will be open too late and can easily dilute the intake charge (like an EGR system) and that might cause the mixture problems. So a timing re-check seems in order. (It is soooo easy to do something wrong in that process if you don't write everything down. I'm pretty good with it but if I don't write it all down, and then crunch the numbers on it all, I can fool myself.)