Last time I had this issue with a leaf after install it was a mechanical oil pressure line that goes to a gauge in the dash with a union at the firewall. It leaked on the back of the motor which drove me nuts as it doesn't push oil out with the vacuum pump normally.

TomP, the other issue with with oddly shaped inlets and undersized plenum volume is the stack up of compromises which altogether could represent a loss of 5-7% HP, 50-70 on a 1000 hp engine. Even with EFI, cylinder to cylinder balance is affected by both of those design considerations. The information Jay has posted has shown the value of top mount throttle bodies vs. front mount with his original plenum roof design.

Given Drag Week is also about going as quickly as possible five times in five days, we all have to make choices of esthetics vs. performance. Jay has had some of the best looking cars at the event year after year. I can't wait to see the final product in action at Tulsa this year. With right trans and chassis combination and optimized power Jay might be the first small tire N/A car in the 8's.

Jay:

On the crank case vacuum I only see 12" on track. I know it could go higher as it flattens out when it hits the vacuum break set point at the top of 1st gear. At idle it barely registers on the vacuum side of the analog boost/vacuum guage I use to watch it going down the road, at cruise around 5-6". It's connected to the driver's side valve cover. In 2012 Scott and I added an additional GM style MAP sensor which is plumbed to the passenger side valve cover. It reads prettty much in sync with the analog guage and of course we can data log it. Still shows KPa as i never got around to mapping the conversion for the virtual gauge.

The engine seal issue turned out to be way harder than I expected the first time around and your SOHC is way more complicated my 385.

When given a choice I opted for -10 lines form the VC's as I was told they would have lower velocity and would pull less oil out of the motor. The big shock was the amount of water in the one quart Jaz breather can at the end of a long day of driving. I ended up with two as just one over flowed on the first ten hour day with a lot of humidity. Now I drain them every day at DW.

Bill

Interesting TB. The top mount lever makes the air cleaner/filter question interesting.

It will be interesting to see what happens with the other two TB's Jay. Any time to whip up a more symmetrical top for the tunnel ram?

How will you test the new sensors?

But, the question today is cam phasing, do you know where yours is?

When the Wilson guys did my manifold, we talked about volume and their CNC program for the cast Trick Flow tunnel ram was created with my heads and and the flow numbers we had from the devlopment process. As is it's about 112% of CID. We had to guess a bit at operating RPM as that version had never been together before. The big deal according to them was the runner inlet shape which in turn was dictated by the casting thickness.

I like the 'hump' idea for adding volume. Good luck this weekend!

That is one of the most striking cars we've seen at DW. I noticed in the pictures that there did not seem to be an upper core support member? On my '71 I made that part removable to aid in engine/trans swaps but the fenders/ engine compartment actually squeeze in by about 1/4" when it's removed so I've been careful to keep it structural. Did you see any evidence of movement from the drives or is there reinforcement you can't see? Otherwise it would seem that the radiator is a stressed member?