OK swapped in a 460 in my 79 Bronc, everythings done been tryn to time it and still fawked up. Hit all 4 points... twice, moved the distributer all to hell. I have spark, carb checks good, no vacuum leaks, new edelbrok timing chain,etc... The timing light checks good its hitting the mark. Had it runnin fer 30 sec or so but was runnin at a high idle. Everything has been double checked and still messed up. Little help.