Actually you are not supposed to soak or prefill lifters. They fill and take up the lash when it's either prelubed or fired. Pre-filling can hang valves open. If it was me I'd run it a bit more. You may find they bleed the air and quiet down with some heat cycles. If you have to change them, check the preload first when the intake comes off, and make sure that is right. Some lifters are different pushrod cup heights so changing brands may lead to real issues with preload and pushrods.
