Reply to "Need help with ignition setup and Bad MSD 8350"

Last summer i installed a MSD 8350 distributor in 6915 along w\blaster SS coil and 8.5mm wires. Same problem it would start and run on about 5 cyl.for about 10 sec. w\spark getting weaker as it stalled. Called MSD,they said"you probley got a bad module send it back".It came back three weeks later with a tag attached that stated"Tested 6 hours at 8,000 rpm no problem found.I was a little upset,I was ready to take a hostage and start my demands!.I reinstalled the 8350 distributor,no start,I hooked up the wire from the starter soleniod to coil pos. that gives it 12volts while cranking. IT had a points dist.w\balast resistor.I removed that prior to installing the 8350 and installed a relay w\12volt feed .It still needed the 12volts while cranking .IT runs prefect now. I read a post on this forum that said to use 1 light silver spring and 1heavy silver spring w\black advance stop bushing,ported vac, set timing at 20degree use the orange accelerator pump cam [it has a holley 600 ]i have rev limiter set at6,000 and it pulls strong all the way This 8350 kit came with a digital 6AL box also,so i installed that after i got it running good.it runs the same i cant feel any diff. FWIW i feel the same about MSD they were useless,after alot of BS i am very happy with it now