Best bang for the buck?

How is it when I say you're not going to turn this guy into 13.5 I'm derailing the thread question mark but the next guy behind me says it and gives out all the numbers and it's legit?.

My old '71 340 Cuda (hot street car) when I bought it back in 1980>
All stock motor, 750DP, .484/284, 727
B&M super Holeshot,
small tube hdrs,
all stock suspension (used to lift drivers front tyre)
3.55's, M&H 8x26's
MSD6A, NGK5's, 36 total on leaded 97ron
ran high 13.2's@101+ = 301 actual fwhp with all ancillaries, I got it down to 13.1's with some tuning if I remember correct?
You could say thats not a lot of hp for a 340 with that spec but the no's are from the 1/4 not a dyno, it was an all steel car@around 3550lbs with me....

So trying to get an actual 266fwhp on track from a teener with 8:1/manifolds, cam+J heads is gonna be hard work with just a tune compare it to a bone stock '72/'73 340@245hp. But its gonna be fun trying, thats what its all about. A 650DP would certainly help a 1/10th, but its got to happen as it is now.