E58 400 plus HP Dart sport build

Wiki says Oklahoma is around 1200ft elevation.
10.7 is a good number for alloy heads....... with the right cam, like one with an Ica of around 60 degrees. Your cylinder pressure would come at around 178psi, not optimum but pretty close.
The Mutha-Thumpr SBM is spec'd at
287/305/107(probably at .006tappet), and 235/[email protected] lifts of .530/.515 with 1.6 arms, and they want it installed at 102.
If you do that, the ICA will be about 67* according to their spec numbers. This will drop your cylinder pressure down to around 167psi. Well you could almost run that with the iron heads. So then you have given up a pretty large amount of the advantage that those alloy heads offered.
Ideally you would want to run up around 185psi and I run there on 87E10. To get close to that with an Ica of 67*, you would need to increase the SCR to 11.5 for 183psi, and now yer talking!.
The difference between 167psi and 183psi is night and day in the midrange and especially at the lower end.
What I'm suggesting, is,
that you could probably run a cam about one to almost two sizes smaller on the street, depending on your local elevation, at the higher pressure, and not lose any zero to 60mph ET; and the bonus is that you could run a more street friendly convertor. Not to mention pick up a ton of fuel-economy.
You paid a lotta money for those alloy heads, and now with the Mutha, yer giving up a considerable amount of the benefits away, to get a sound? which comes from the very early opening exhaust event, and the exhaust-dilution on the overlap cycle....... which used to be called EGR; the very thing everybody loved to hate when it first came to the Mopar-world in the early 70s.
Ok, I get that the 235*cam is gonna make a lotta power.
But it's top end power.
If you run a street friendly say 3.73s, With a powerpeak around 5300, that would come at 52/71/103mph. Shifting at 6100 will be around; 48/82/117mph. Course this assumes the tires ain't spinning all the way. ...... and that will be the best trick. If you can't hook, yer 60ft alone will be well over 2 seconds. So what good is all the power gonna be if yer already a half a second behind a guy with half the motor, who did hook.
Here's what I'm saying: by my car's trapspeed of 93mph in the Eighth, it is making over 430 hp. In second gear (Manual trans and roadgear of 6.82) She will easily break traction at 50mph with BFG 295/50-15s. If it's already spinning, then it will keep right on spinning all the way thru Second, to 7200=85mph.
Ok I get that I can back out of the throttle and let the tires catch; but that would be missing the point. If I back out, I might as well just have less power in the first place. My Hughes HE3037AL cam specs at
276/286/110(@.008tappet) , 230/237 @.050, lifts of .549/.571 @1.6arms
This is about ONE size smaller than the Mutha, but without the Exhaust hoopla.
Here are the rest of the events, first the Comp with the advertised probably at .006 tappet rise ; then my Hughes3038 at .008 tappet rise, then my previous cam (HE2430AL) which was my favorite, especially when it ran at 11.3Scr/pumping over 190psi.
287int/114.5 compression/95.5extraction/305exhaust/82*o-lap/Ica of 67*
276int/ 114 compression /105 extraction/ 286exhaust/61* o-lap/Ica of 66*
270int/ 119 compression/108 extraction/276exhaust/53* o-lap/Ica of 61*
This last one (the HE2430AL) was BB strong in the bottom end, and even up the midrange. It was so strong that I traded some pressure for extraction, by retiming the cam and bolted on a double overdrive trans, geared for 65=1640rpm, and promptly got over 30mpgUSg. Yes and it too never got anything but 87E10.
But Ok, I get that you may be hooked on the Mutha's sound, but at what sacrifice?
And OK, I get that you might not care as much about being quick in the Zero to 60 arena. But I had to give it up, or put a buncha money into the suspension. Which would have made her a point and shoot kindof car. But I came to find out that I really liked sliding around corners near full steering lock. So then, I just learned to be "pretty good at it" as one cop said, as he handed me the ticket with a big smile on his handsome face. Then added; "but you can't be doing that here...." Sir-Yes Sir!.