I've got an 85 Z that I rebuilt down to frame it runs rides awesome but in gear under power it's boggy like only has about 75% power until it I hit 3/8 to 1/2 throttle then surprises the hell out of you (especially the first time it happened) suddenly front wheel wants to lift its got so much power. In neutral you can't tell there's anything abnormal happening. Only thing I can figure is jetting? It's got an it490 rod and spacer mod but can't see that would have anything to do with throttle/power. Any help would be great thanks!