505 stroker fresh off the dyno - Power seems low? Thoughs?

One last(?) comparison......

I built a 10:1 493 probably 18 years ago or so.
This was a “hot street” type build that was going into a 70 Coronet wagon, with AC.
Prepped RPM heads, wide lsa cam for good vacuum, SD manifold for hood clearance, new Holley 850DP carb, 2” headers.

It made around 590tq/560hp....... which was about what I was expecting from what I considered a really mild build.

Granted the heads and intake weren’t as good as what the OP is running...... but both the tq/ci and hp/ci are very close between this 493 and his 505.

Around that same time, I re-ringed a customers 446 that had trw L2355’s in it.
The top end was basically the twin to the 493 above.
I was expecting it to make 540-550hp.
After one dyno pull I knew I had missed the mark with the combo and it wasn’t going to get there.

I ended up trying quite a few things on the dyno(intakes/carbs/headers)...... and was never as close to the “big number” as I wanted to be, so I ended up taking a big swing at the cam.
It didn’t make much difference with the intake/carb/header combo that was destined for the car, but with a big carb, my dyno headers, a Victor intake and a 2” super sucker....... it did get over 560hp.
But none of that stuff was going in the car, nor would the car have worked very well with that combo.
What i should have done was gone to a slightly smaller cam, tightened the lsa up a bit........ shot for a better TQ number...... and then “iiwii”.

When you’re putting together an untested mix-n-match combo of parts....... sometimes it doesn’t work out as well as planned(and sometimes it works out better than planned).