reworking stock heads or buy aftermarket?

If you put those Eddies on, and a 220* or so cam, you may find the torque sufficient enough to postpone the 408. You will also likely solve your bent stuff issues.It doesnt take much to float stock 360 valves.
$1000 aint cheap, but considering the amount of repairwork your current heads will need, and the fact that they (the iron ones)will likely get shelved and not used on the 408, and the Eddies are a really good starting point for a 408; kinda makes it, for me, a no-brainer.
If the Eddies are in good shape, could be a great deal, cause how much are they costing you, over what it would cost you to repair yours,mild bowl work,quality valve job,high-lift capability, and extra springing; and then,throw em away?Yup, close to nothing.
Plunk down the greenbacks and never look back.