I am doing the rebuild of a LT1. I considered the MSD. Then thinking why not the MSD Opti KIT (near or at $1k) .. for a few more dollars and the LS1 PCM, 24x is perfect for me. I was stranded in Chipley, FL with opti problem and said this will NEVER happen again.
MSD has a warranty. But you know that's still down time.
I am doing the 24x conversion this time. Only replace coils somewhere near 100k miles.
But if I was going to get an Opti, it would be the MSD. Not the Accel. But that's just my opinion and my opinion only.
'00 Safari SLE with '95 4bolt 355 LT1; decked .010'', hand ported 374s & intake (David Vizard tech), 1.94/1.5", farmed out EFI 24x, 2001 LS1 pcm, VooDoo 211/219*, w/1.7" rr .574"/583", 4L60e, shift kit & corvette servo, G80 GT4, 3.73:1, ported & massaged Granny's Speed Shop headers, true duals, 2 long Cherry Bombs used for resonators, 2 long Thrush Turbo mufflers, local tune under an Oak tree. 5 year project/swap.