My stock '84 T-1 Lebaron convertible (107K) seems to be overboosting. Under WOT it will buck and sputter like it's cutting out from overboost. I've replaced the HG (MP4452005) and put the correct 126-tooth Goodyear Gatorback Timingbelt on it. I have the timing set at 12 degrees BTDC (this 1984 year engine timing spec is 12 degrees BTDC right?) New Champion 12's gapped at .035. All pretty much set to factory specs. I'm lucky and still have the VECI sticker and have all the vac lines run right. Hoses all snug. Isn't the Wastegate a mechanical one for this particular year? It seems firmly connected. The bucking only happens at WOT but it seems to only want to go 50-55mph. No codes. I've rechecked the timing three times and it holds at 12 degrees. Made sure CTS was disconnected too.