A properly built/tuned 390 will keep up with anything you are going to encounter on the highway, and then some...
If its a sound block, my advice is to stroke it, slap a set of Edelbrock aluminum heads on it and put it in the car. You lose bragging rights, and thats about all. From the engine compartment, you can't tell the difference. Later, if you want to upgrade to a 427 or 428, you can, as its a direct swap.
My .02 cents worth.
Bud
