Lifter rattle at start up

as the valves are longer did you measure the installed height of the new valve springs as they would probably be for stock mopar valves and may not have enough seat pressure with the longer valves. just a thought?
neil.
Yes at 1.6.... 115lbs Im thinking valve springs causing a small amount of leakdown over 3 days...timed it at 55 seconds this morning before tappet noise stops completely. maybe just have to live with it i guess,,,