DID SOMETHING SILLY STR12 INTAKE LOL

See that little boss in the rear carb for a vacuum fitting? Consider making that a blow off valve like maybe a big barb fitting with a tight vacuum cap on it. If you ever get a backfire, it may blow off and vent before cracking your top. Ive seen more than one tops that have been "repaired". I bought mine with no top for $100 and made dual and single 4 tops out of 1/4 (didnt last, 2 390 carbs backfired and popped top) and finally 3/8 plate that survived one and only backfire.