HI all....took the 54 235 3100 out for a spring fling around town. Beautiful weather and the wife was loving the drive. The rebuilt Rod-B was great and the vacuume numbers were in the 18 19 area at idle. Flat driving 35 to 55 smooth as glass. BUT when we started a climb up a steep grade we got hesiatation, bucking and mother backfireing. I limped up the hill and down the other side flat driving once again and all was fine but as soon as I lifted my foot off the accelerator on a slight down hill slope I got those little backfire farts? Coil new and new spark plugs and timing about 5 btc..18-19 vacuume at 650 idle and engine running cool 160 to 170...I want to install my Langdon HEI system but I thought one thing at a time...what gives with this backfire stuff what is the cause.....? THANKS, Steve
