All ActivityMost RecentMost LikesSolutionsRe: P30 chassisIf this is a vortex 454 engine and hard starting after it sets for an hour or over night then it could be the fuel regulator. The fuel regulator is under the intake manifold cover and if faulty it will slowly leak fuel into the intake. It takes sometime to leak enough fuel to flood the engine on start up, this is way it starts fine after its been running. Usually there will be no other symptoms only hard starting after sitting for a period of time (depending on how large the leak is). I hope this helps you out.Re: 7.4 Vortec coolant leakMost likely it's the intake gasket leaking. Not a hard fix and it is a common issue. Put in the Felpro gaskets and torque down the bolts slowly and evenly. Do not over tighten use the torque spec and a torque wrench. I've done a lot of these. My own RV with the 454 Vortec went bad at 30K miles. DaveRe: P30 Brake Lockup - SolvedI have repaired this same issue on many vehicles. The front rubber brake lines swell and block off the brake fluid from returning to the master cylinder. I realize from your last response this was not your issue but for those asking why are both lines going bad at the same time. It's because they deteriorate at the same rate. You will not even notice a brake pull. I've pulled these lines off and could not even blow air through them. What most customers notice is their brake pads wear out quickly? Dave