700hp 493 build specs thoughts

This is going in a buddies 3700@line 1970 Challenger brkt car that hooks. Minimal street use.
400 block, 4.150 Eagle kit, 10.8>10.9:1CR
TF270's, 264/[email protected] s/roller +/-, .660"+ 1.6 r/rkrs=.704 less lash, not sure on this yet?
2" hdrs, TF B intake or Indy, current 830DP, bigger later 1050 4150/Dom?
single external line.
Hoping for 700, will be dyno'd, runs@Santa Pod raceway, 341FT above sea, good DA
what are your thoughts gents, anything you'd do different, suggestions....
thanks
After having an Eagle crank in a 493" in a drag car I bought break and ruin half the engine using anything Eagle from now on would be a no for me unless it was a very mild build.