okay guys, just to put the topic at rest, I solved the issue!
Originally I had a stumble off idle but especially during light acceleration while coasting. My plugs were really clean first time I checked but I still had a stumble, so I advanced the timing to about 11 degrees and put in a jet that was two sizes larger, which made a little bit of difference but it was still laging. This time tho, the plugs were a perfect mixture of gray and brown. I changed the accelerator pump cam to the extreme, (a bright blue one, fast and early squirt, although I knew this wasn't the problem. Still had no effect. I checked the idle mixture screws and backed them out accordingly. Then I thought what the hell, and I backed them out an extra turn. Problem fixed! Thanx for your input!