Yes they are.
All 1971 VW Beetle engines were manufactured with solid valve lifters.
They all had hydraulic lifters. To determine if it has roller lifters, you'd probably need to take off the intake manifold and have a look.
No, first generation 3.1 does not, second generation does.
First of all Chevy did not make a vortec engine in 1987 or 1995, those engines are TBI / Throttle body injection engines. And yes they will interchange with no problems.
No, not all small block lifters are the same; they can vary based on design, materials, and intended use. Different small block engines, such as those from Chevrolet, Ford, or Mopar, have unique specifications that affect lifter compatibility. Additionally, lifters can be hydraulic, solid, or roller types, each offering different performance characteristics. Therefore, it's essential to choose the right lifter for your specific engine build and performance goals.
The two are not causally related, however... sitting for a long time could result in both a dead battery and oil draining from the lifters.
Above 60 psi if it is a CPFI= Central Port Fuel Injection. wish I am sure it is, all Vortec engines have this CPFI.
1996 was the first year that all GM trucks went to Vortec engines - it IS a Vortec...
The "Vortec" engine is almost the same as an old school SBC, all things being such, the push rods are a little different for the OEM roller cams.
Vortec engines, while sharing some similarities, are not universally interchangeable due to differences in design, size, mounting points, and specific applications. For instance, the Vortec 4.3L V6 and the Vortec 5.7L V8 engines have different dimensions and configurations, making them incompatible without significant modifications. Additionally, each engine generation may have unique features that affect interchangeability, such as intake manifolds and accessory mounts. Always consult specific compatibility resources for exact engine swaps.
No, some are rated at 195 h.p.
They are rocker arms that go under the valve covers and make the exhaust and intake valves open. They have small rollers that have little needle bearings in them that reduce engine friction and allow the valve train to work in a smoother maner with better performance.