Hoping someone understands what's going on here. Installed a 69 (in theory) quick ratio power steering box in my 67 and took the power steering pump from an 87 Chevy truck because the brackets fit my 350 vortec head crate motor. Got adapters to use the original hoses. So first pump started yodelling when warm. Never heard that before so changed out the pump. Ok at first but yodelling coming back. Wondering if new pump drives too much pressure?