[SBillinson]

The -AA come with 1.84/1.54 valves.

The throats on a set I have measured 1.64"/1.27", which would give you a 92% intake throat and a 87.5% exhaust throat when using 1.780"/1.450' valves.

In other words, you'd need to change the intake seats because the throat's too big. A 92% throat will work, but 88%-90% is where you want to be for a stocker.

You'd also have to sink the exhaust valve, but there's enough material on the seats to keep the throat at 88-89%. Depending on how much you have to sink them, you may be better off replacing all seats in the heads.