High 10 sec. A-body

I have a 71 demon would like to see high 10 sec. timeslips I have moser fabricated 8 3/4 housing with 4.30 gears and looking at caltrac bars and monoleaf springs have torque boxes on order and looking at rollcages. I have a 68' 340 block with x heads I want to use a roller cam and lifters and maybe a 4" stroker crank thinking of Indy heads also. Any opinion or ideas are welcomed. Also wondering about tire size, height and widths using super stock spring heights; with springs NOT moved inwards.  

A 416" motor I would do the following.
Solid cam .600+ lift, 252/256 duration.
11.5 forged pistons.
Eddy or indy heads ported and polished, LA style, rockers are more secure for the big lift.
Mopar Aluminum rocker covers.
Mopar 600 lift valve springs.
830-850HP annular discharge double pumper.
1 7/8" or larger headers.
Victor or Indy intake.
727/4000 stall converter, Dynamic makes some of the best trans. parts.
Cheetah manual valve body.
Hurst Pro-ratchet 2 shifter.
Tons of cooling for the trans. and the motor.
4.30's
without moving your springs inward a 28 x 10.5 goodyear d-5 slick. If you decide to move the springs go big, minumum 28 x 12.5.
Cal-tracs and adjustable mopar pinion snubber.
Weld racing rims, min. 10" on the rear.
steel motor mounts.
h-beam rods.
external oiling.
1.6 roller rockers, name brand only, I use crane gold, only need adjusting once a yr.
Eagle forged 4" crank internally balanced.
MSD6al or if it is strickly a drag car the 7 series.
Holley blue fuel pump.
Can you say 650+ horsepower?
Hang on cause you are gonna yank the wheels and run 10.50's.
Two radical? Knock the comp down to 10.50, the cam duration to 248/252, run a 800HP/DP annular on a ported M-1. Your still gonna make close to 580-600 HP with this and run 10.90's all day shifting at 6500 rpm. You can run a stock oiling set up with a deep pan and a windage tray.
Personally I would build the second setup and drive it to the track. That's half the fun.  
Good Luck
Doc  

I just looked at the price of indy heads would it be cost efficient to open up the x-heads that I have or go after market in your opinion. I also like your second option better being able to drive it more would be nice; also would that be a race gas only engine you think.
THANKS  

If you go the x-head route it may still run High tens on a good day. Be sure to have the port and polish work done by a pro, such as indy or hughes. Large valves are a must, especially the intake. Min. 2.05 intake, exhaust 1.625.
With the steel head you can run a half a point less comp. and get similar results.
So 10-1 or 10.5 comp. This will be a pump gas motor if you have enough duration.
252/258 range .578 lift max. or .550 max adjusted lift with a solid cam.
Use 1.5 rockers to get the most out of this set up. Why? Simple there is little to be gained in running the 1.6 rockers. Why? Factory steel heads do not flow much past the .550 lift range.
All the rest the same as the last build.
You might want to step up to a solid 4200+ converter with the extra duration.
That will all depend on how big a tire you go.  
If your only going to run a 10" tire then stick with the 4000 converter.
Fact is if your gonna run 10.90's you get into extra problems because you will need a transmisson blanket and cooling becomes a real issue. Not very practical for a street car.
So since you are leaning that way why not build the above and set it up to run  low to mid 11's. Your still gonna have the fastest ride on the block.
Best of Luck
Doc  

go with ported edelb. heads, 11.0:1 , 255/260 roller cam for easy 10.7's with 93 octane.