here's that SMP ad for its Vortec replacement distributors
The SMP replacement Vortec distributor PN's are Z95001 for V8 and Z95002 for V6
Me thinks it's more likely BOTH NAPA Echlin and SMP Vortec distributors made in same USA plant.
Msd Distributors 96-00 sbc Vortec
I have two 98's , a k1500 with a 383 and a Silverado with a Pull a part 350. Never had a problem with distributors, all they do is sync with crank sensor . A new cap and rotor , wires and plugs work wonders .
www.gmt400.com
The SMP replacement Vortec distributor PN's are Z95001 for V8 and Z95002 for V6
Me thinks it's more likely BOTH NAPA Echlin and SMP Vortec distributors made in same USA plant.