hello, forum I need some help to understand what could be the problem with my maverick, is a 1976 ford maverick OZ 2v 250, cam 264/264, with a holley 350 pv 8.5 and jets 56, timing is 14, vacuum at intake was 16Hg. She ran great for about 4 years, but since last month she lost power, I had to lower power valve to 7.5 and then 6.5, also the jets I lowered from 56 to 54 then 52, 50, 48,46. Now she runs fine a couple of minutes and then when it is hot at normal operation temperature (180F) she doesnt whant to run, is very slow, the vacuum at the intake is 4hg. I thought that could be the coil or the module since the spark plugs are very black, I changed the coil and module without luck same issue, also I thought that could be the carb, I borrowed another holley 350 and it has the same behavior. Please can you give me some advice what else could be the problem with my maverick. Thank you.