Quote: intake and carb are factory 2 bbl... I think the carb on it now is the factory correct Holley for an '85
Ok a stock 2 barrel with headers and flow masters coupled with todays awesome fuel could point to a lean condition especially when leaning on it IE: highway speeds. Bear in mind they were lean from the factory
I would map the timing, verify the pulley sizing and then check the AF ratio
I have installed at least 10 sets of headers for my self and friends over the years. Every time I jetted up the carb, you have to when you put on headers. That's called tuning your car, not just bolting on stuff.
Then add 10% ethanol and your lean as hell.
Can't believe the OP and most everyone else over looks that.
