All of th above Paul have already been purchased over the past few yrs with thanks to MSD’s New Years discount sale excluding W/S & C/L, with the addition of an Airtech 500 intercooler and all the other recommended upgrades which will be going on it when it’s back from the painters, and possibly treating myself to a T34!

So the reason they didn’t come from the factory polished then is down to not having any real benefits and also cost.

I’m guessing the early motorsport touring cars etc would of used an aftermarket plenum?