Anybody here using the Pipemax app, or other software to build headers? I have a coupke recommendations from Koeffel's Place, but since it is an endurance application and kind of odd I'd like to run the numbers. Mr_P_Body Mike offered a while back, but I didn't have the numbers I needed at the time and he hasn't been on here in several weeks, hope he is ok.
If you can and care to help, please let me know. Thanks, Jerry -numbers below

volumetric efficiency if known -unknown, but estimating 105%? Your guess is probably better than mine.
bore 4.500
stroke 3.915
rod length 6.7"
compression 14.9:1
peak hp rpm - hasn't run, say 7500+-
valve diameter 2.40 Ti Int, 1.78 Ex
valve stem diameter .3142"
valve lift .879 Int @1.75, .850. Ex @ 1.70 T&D rockers
duration @ .050 282 Int, 303 Ex
LSA 114
degreed center line 112
flow of the heads
Lift.  L/D    Int.   
.500  .208.   357    
.600. .250.   394   
.700. .292.   425   
.800. .333.   443   
.900. .375.   454    
1.0.  .417.   456
Lift.  L/D.   Ex
.500.  .281.  243
.600.  .337.  274
.700.  .393.  299
.800.  .449.  312
.900.  .506.  319
1.0.   .562.  336
exhaust port length of head- 2 7/8" measured as far into the port as I can get a tape measure past the valve stem to the far side of the pocket, to the bottom of the port exit as installed.