Street racing 70% of the time means there is a good chance of your son not having his father much longer or even worse that your wife may not have the ones she loves the most much longer.
I am not saying that I have never done it. Most of us have but thankfully I lived long enough to smarten up.
I would hope that since your old enough to have a son that you are also old enough to know that street racing is DANGEROUS
and STUPID!
Cobras are enough of a handful all by themselves without throwing some other goofball driving his car at the edge into the mix.
please consider knocking the street racing down to 0% and track racing to 100%. I can not imagine not having my Dad around when growing up, don't deprive your son.
Have a good one,
Dan