Love your 60, I have had the same one for many years and have faithfully kept it up, lots of add ons for off roading as well. 200,000 miles, pretty much rebuilt everything, perfect condition and I love it!
Added Holley Sniper FI two years ago, it has NEVER run right. It is now at a fourth shop that has tons of FI experience as it is mainly a Porsche shop, so the owner has fooled with all types of FI. I am hopeful, but very wary. One shop said they've never gotten their Sniper installs to work properly.
I've been back to Holly customer help many times via phone, wait times are VERY long!!!
When first installed the injectors ran 100% of the time, filling the crankcase with fuel, had to sent it right back to Holly, they replaced ALL the components. There are ~10 more bad stories after that.
I do get better mileage, I think. Its now been at this Porsche shop for a week and a half, so $$$$$ are accumulating even more. I guess I have over $4000 in it and counting.
And I DO see and now recommend the wisdom of embracing SIMPLE for reliability. But the siren song of better mileage, power and slip angle
with a carb, got me.
And I had to add a new distributor which I think has "computer-ish" components as well, so if an EMP comes, I am screwed
Enjoy the feedback!