347stroker_carb

hey, im new to the forums and I just completed my 347 stroker build and im having a difficult time trying to get my timing right. im running a DSS block with forged pistons and Anderson N51hr cam. it is converted to carb and has a demon 650 on top of weind intake. I have the current timing at 20* and it runs descent but I don't know what the true timing would be at. any tips to find the right timing??