Hi you guys i went all through this more or less to get the size for the act sensor tap. Am i missing something here or what, you say use a 9/16" drill and a 3/8" npt tap? how can that work? there will be nothing to tap? I have a whole slew of intakes that i am restoring, 5 gt 40's, 4 cobra's, one 94/95 ford motorsport svo and 2 roush 5.0 intakes. I have original gt 40 lowers and casting numbers for most all that there is, i will document this and add to the thread. I have read before of the inherit weakness of the number 5 runner on the 94/95 cobra intakes, hence fords svo intake and holley even made a replacement for the cobra lower, i have the part# somewhere, i will find it. But for now how can you drill a 9/16" hole and use a 3/8" tap?
I have been experimenting with powder coating and polishing and i have found 1 awesome powder coat called EXTREME CHROME, i did a cobra upper in it yesterday and it came out awesome! I will get some pics and add some info, i can tell you though that putting an egr explorer BB intake beside a BD or CA gt 40 lower you can see the difference in the #5 port the original gt 40 lower is raised and must flow much more even than the explorer egr...