MSD Distributor for 350?
 

I have a Blueprint 350 5.7 in my 1972 K5.
It's always ran a bit rough. For years I hunted down a vacuum leak. Then I did an engine swap and it still had the same kind rougher around the edges issues.
The only thing I haven't changed yet is the distributor.
What I have in it is a GM HEI. If I swap it out, I'm leaning towards MSD.

Any recommendations for MSD Distributors? I don't want the kind where I have to also install an external ignition controller. I'm not too worried about cost, would like to keep it under $400, but also want to just have it run real nice (and maybe better fuel efficiency?)

So let me know which MSD's you've tried and what worked well!

Re: MSD Distributor for 350?
 

What is your wiring like that provides power to the HEI distributor?

Re: MSD Distributor for 350?
 

The previous owner of my 1972 Cheyenne 402 replaced the OEM points distributor with an MSD pro-billet unit. It worked ok, until it didn't any more. It suffered sudden death while parked in my garage over last winter. The module failed. I located the correct points distributor, and replaced it. It had maybe 10k miles on it and 15 years.

https://static.summitracing.com/glob...8360_jy_xl.jpg

The truck ran noticeably better with the original points unit. This is probably due to the timing calibrations, since I used only correct NOS parts to rebuild it.

Re: MSD Distributor for 350?
 

Here's a link to MSD's "Ready to Run" distributors:

https://www.holley.com/brands/msd/pr..._distributors/

My experience is with a pro billet distributor and an ignition control box with an external coil. The box sends 4 sparks below 3,000 rpm, and a longer stronger spark above that. It makes sure to get a complete power stroke. That set up went over 100,000 miles in a 6 year period. A few of those years were 25,000 miles per year with heavy interstate hauling. It was always turn key to start, and never left me anywhere.

I can't remember if I experienced a miss or I was inspecting the distributor between engine builds, but the shaft was loose. MSD had a service to install new bushings, drive gear, and any other wear items for a reasonable price. What I was told is that sometimes there is poor oiling to the drive gear. I would buy from MSD again. I believe that the GM HEI modules are susceptible to heat, and I had one with loose bushings also. So it happens.