Need help with a cam selection for swap

Yeah I'm with TXDart I think your problem is the octane your running , even 10.5 is too much compression for 89 especially since every 89 sold in Canada is cut with ethanol and very few people buy the mid grade most go cheap or go big eh! Try some of the Shell 91 it's ethanol free and is the best substitute I have found for the Chevron 94 I run in BC .I'm at 10.2 and I run the Shell on my cross country trips to Moparfest and it seems to be pretty decent as long as you can avoid the Flying J stations for some reason they have crappy 91 octane gas most of the time .