Low Band Apply Question

My ex partner has been building 727 and 904`s for 50ish yrs. , he built the "low band apply" fully auto. that is currently in my 505" 68 fastback. If I get on it burnout or not, the tires will not get any bite in low gear anyway, mostly second either, but will grab and hook up when it shifts to drive. I cant remember how he said to do burnouts ------going to have to call him.
If he built the valve body then he would be the one to ask.