New to me Barracuda with Mopar Crate 390hp low oil pressure

70 DUSTER CRATE said

if you don't mind me asking ? What heads and exhaust system are you using ?

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The largest MOPAR Magnum heads and prior owner said they were machined for 2.20 or 2.02 exhaust valves. Idk if that’s even possible. I can verify it has 1.7 ratio roller rockers and she sounds like a big cam. Exhaust is full length TTI headers.