Glad to hear you're driving it and happy with the results of all your hard work and effort. There have been many here that have modded their vehicle only to have it backfire and end up on jack stands for what seems like eternity and/or won't trust driving their car for long trips. I'm happy with mine too and I drive my car often and my temps stay cool (no overheating) and I have great reliability and ride comfort. I think it's all about self control. A lot of high HP builds end up in rebuilds and jack stands with endless siphoning of money unfortunately. Build threads like those keep me in check when I get the itch to run a smaller pulley for more boost Might be fun for a minute until my T5 or my head gaskets crash the partyHa! This hesitation is completely gone! I guess the computer worked it out. The check engine light is on solid. When I first put it together I had 67, 81, 82, and 85, but the CEL was not on solid. Now it is on pretty solid just after initial start up. The new players are 23 which ended up replaced by 63. Driveability hasn’t been affected at all. Still beating the piss out of it. I’m not sure what you guys with 500+ hp do but I’m probably half that and pretty satisfied. I think with the 351 I get torque which makes for a fun street car.