Id still can only recommend the TTI units.
Taking a lot of time laying on your back to change plugs is not my idea of a good time.
Taking headers in and out of a BB A Body car several times to tinker is way more than I personally would care to deal with. Im getting to old for that.
The TTI units are pricey but they are worth all the stress and hassle they will save you in the long run. Just My
My 440 Dart had a set of "persuaded" headers on it when I bought it. If you want a Budget set that is a PITA to work with.