ok,,I need a guesstimated opinion,,,my motor has seemed to fizzle out to nothing,,,,,,ran beautiful when i tore truck down,,,,,,ran it while i was rebuilding truck,,,,finally drove it for about 50 miles,,,,,,,,now it wont even start,,,,backfiring out of carb when trying to start,,,,,got good spark,,,plenty fuel,,,but major blow-by now,,,and #1 plug around 50 lbs.& #2
plug around 70 lbs. compression,,,thinkin timing gear and chain,,,,any suggestions,,,,