Oil pressure drops at idle
I have my truck running and idleing now after I put on some ported heads, 4bbl intake, 4bbl throttle body, fuel injectors, and some roller rockers. The truck idles decent at around 800rpms. When I start it up, the oil pressure goes up like normal, but after about 5 seconds, it drops to zero and the "check gauge" light comes on. I can rev it up and the oil pressure will go back up to where it should be, but when it goes back to idle, it drops again. The oil is at the normal level, but I am getting ready to change it again, along with the filter. What are some things that would cause this?
Also, I dont have my valve covers completely bolted down, only 3 or 4 bolts on each cover. Would this cause the oil pressure to drop at idle?
1999 Dakota r/t
380hp crate, 4bbl M1, 1000cfm mopar 4bbl tb, 24lb fms injectors, SplitSec VC2, 3.5" magnaflow, Paxton Novi-2000, Vortech FMU, ShadyDell Edelbrock stage 3, 4.56 gears, ASP crank pulley, Black Magic 180, viper 3000 stall, PPH headers, Detroit TruTrac + more.