Truck is breaking up under load l29 454 whipple charged

[Pinger]

Seems to me that there's a lot of electrode wear on those plugs for only 9K miles/

My observation also and possibly a clue as to whatever the problem is.

 

[1990Z71Swede]

Plugs are done, that offset "wear pattern" looks super weird. Also the V-groove does not seem to be helping. Do they all look the same? Will probably run fine with new plugs. I wonder if all the MSD joules/multi sparks are a bit much for those plugs?

Thumps up KevinG for posting excellent pictures

 

[Schurkey]

I ran MSD 5 and 5C, and MSD 6A, 6AL, and 6T (the original, analog systems) on multiple vehicles starting in '79, until I got tired of the engine stalling due to failure of the spark-box. At this point the only vehicle I own with an MSD (6AL) on it, is my El Camino which hasn't run it three--four years. OTOH, I do have an MSD display unit with a functional 6A box and circuitry except I had to scrap the failed MSD coil in favor of a FAST replacement.

Never had any issues with rapid plug wear on my vehicles.

Currently have a small red Stonehenge in the shop, some of the boxes work, some don't, and some do but I don't trust 'em.

 

[Stockman4127]

Did u get it figured out