1971 Dart Swinger

I ran off the WG spring today.
It felt good up to about 10lbs and then it starts to break up.
I believe the spring will take it to 15lbs, the furthest it got on any run was 14.
I know that is A LOT to ask on a 1974 bone stock 318 with 185k on it. But its going to take it whether it likes it or not. :-D

I think its a combination of a few things.
I gapped the new NGK GR5 plugs to .030 and I need it closer to probably .025.
Run better fuel then the 92 and 108 octane boost that's in it.
And I really need to get a 6BTM or 6AL-2 and a new distrib to run this much boost. I don't believe the stock distrib and plug wires are up to par for the job.

Had the timing locked at 25.
Fuel pressure was 32psi at WOT.


Going to go do some more research and continue adding to my shopping list.