I have GT40 heads milled .030 with stock GT40 valve sizes and the e-cam with 1.6 rr and have no issues with PV clearance. However, I did have to buy custom lenght pushrods to get proper valve train geometry.
I had PV clearance issues with the original 1.7rr on the engine. Bent two valves on two seperate occasions; one intake, one exhaust. Both while the engine was bouncing off the rev limiter.
I beat the crap out of the current combo with the 1.6s with no issues.
You MUST check PV clearance if the heads are used b/c you have no idea what previous owners have had done to them. If they are dead stock the stock pushrods should work.
As you can see from my sig, I have a very similar combo to what you are proposing. Personally, I am a little dissapointed with the combo based on the money and time I spent porting and getting the GT40s read to go. For me to be happy with the combo, I need more cam. Which I don't feel like fooling with.
Many guys here would tell you to buy a TFS Stage 1 cam for that combo..never had one so I can't say. If I were to do it again, I'd think about getting a custom grind.
If you haven't already bought the heads, I'd strongly consider saving some more money and getting some aluminum heads. OR, spend less and port your stock E7's. I had home ported E7's, stock intake, and the e-cam on my engine previously and LOVED that combo.
Good luck...
