i had posted a few weeks ago about having a no start issue after doing some mods to the old lly. Well i got it figured out and it was all due to a few leaking fittings at the filter heads for my new lift pump/filter system i made up. Got them all sealed up and seems to work ok. but i still have to crank truck for quite a while before it fires and once it fires it runs great. I deleted the stock filter and test port. So my question is, is there a check valve in the test port or stock filter head that stops the low pressure feed line to not lose pressure or is it possible that i have another leak somewhere in my feed line?????