Back in the day my 86 intake was flowed against one of the JS modded intakes
and another intake and the 86 stocker flowed about the same as the JS intake.
Considering the fab work involved in the JS intake, the 86 is the best bang
for the buck by far, IMHO. The flow results is why I forgot the ported 84/85
intake, the JS intake and all the rest. the modde upper plenum flows as well
as any other avaible upper plenum, including the stock 86/87 upper.
If you want more flow, do the 86/87 intake and forget the rest, IMHO.
Bottom line, do what ever pleases you, it is your car and your $ & your time,
spend it however you want.