Help the guys out a little bit as well with a little more information.
What is your plans for this truck. Daily Driver or weekend warrior? Your tag says Phoenix AZ is your plan hwy around town for a few miles or are are your going to Interstate 10 this thing for hours to Vegas and want to get it up to 80 comfortably.
trying to keep it stock or ok with resto mod? etc
Now if your looking for getting that thing up to over 70 and staying there a while. I am with John that is not a stock build and definitely not a 216. Putting that foot to the floor and hitting the on ramp to I-10 will definitely be some be wanting for more power and better gearing.
When I got my 56 it had a 307 v8 bored over but a 350 3 speed tranny with the stock 4.10 rear end. It would get it out of the gate (first 500 feet) but trying to top it out it was screaming the RPMs and sucking gas with the 3 speed and low gear rear end.
changing out to the LS and a much better trans and rear end. it runs comfortably down the interstate and around 285 here in Atlanta where if its not gridlock it humming at 80 and doing less than 65 your creating a big hazard. Your already getting folks looking at you and taking pictures with the phone and not looking at the road at any speed
What John says above is gospel his tried and tested findings with multiple trucks.
But once we know your truck plans the guys her can give you all kinds of options.
