poboy427 Ray I run hydro lifters and have no worries and it's a shelby block and heads. These motor expand about .0012-.0015" from just heating up. Every motor has a sweet spot for power and adjustments. If you have the time, and money, go to a good dyno shop and do thw valve lash setup for what the motor wants. I agree with tight lash on a street motor. This will extend the life of the lifters and camshaft. This is also with a good oiling system that puts the
oil where it needs to be. IMO idling a solid lifter cam is just killing the rollerwheel and needle bearing in the housing. Also the pushrod is being bounced back and forward between the lifter and adjuster on the rocker. If you are looking for the most power, run a wider lash. If you are looking for less maintainance run tighter. If your lifters are pressure oiling this will extend there life longer than not. Watch for any blueing on the pushrods. This is a sign of poor oiling to this important contact point. Who's rockers are you running and do you have limiters for the rockers in the heads. Make sure that the valve springs are at least 1/2 of the way in
oil. This helps control the heat they produce. If you are running a HV
oil pump, over fill the motor by 1 quart. It will not hurt anything. Limit your rpms to 6,500 or 6,700 rpms on your stroker motor. This will extend the life of the motor too. There is alot of weight spinning around in the bottom of that block.
Rick L.