timing issues

So when I bought the car it ran awesome. Rev'd up super fast, never bogged. That was last summer. Now I know you're all gonna $^!# on me . But I had to run the car open carbs without air filters (and the car runs triple dellortos) when I first bought it since the gentlemen that sold it to me only had air horns and no filters for it. The car sounds sexy but I know how bad this is. I did an oil change as soon as I got home and bought filters for it. I had to drive the car relatively a 200kms from where I got it back to home before I did all that :S

Now in regards to timing. I don't know if the carbs are clogged, but the car bogs down low now and but hits hard up top in the rpms. It still starts fine non the less. Soo, im hoping there was no severe damage to car from the no filter issue. Im not sure what some good recipes are for ignition timing; if the timing may just be off now. I was hoping some light could be shed upon the matter.

Thanks,

Andrew.