Are these Rocker Covers still available to purchase.Reason I'm asking is the old EL GT is getting a birthday soon, Alloy Heads & Custom Cam, I now have been informed by my engine builder that the new rocker arms will not clear the standard pressed steel rocker covers. I have no desire to rush out & buy some Trickflow Rocker Covers & I am assuming the T3 Rocker Cover is tall than the EL GT Rocker Covers.I intend to use Comp Cams Ultra Pro Magnums Roller Rockers 1.6. ratio.Any of the T3 boys running something like this?