spring relocation

340 Swinger - my first new car.
I don't think you need relocation kit etc. but you do need some changes to make it hook. I'm running a 68 Dart with ±500ponies and mine will hook to the point of lifting the front wheels on launch - and my springs are in the stock location running mid 11s.
My suggestions: buy a set of comp eng 3 way adjustable shocks and set the fronts at 80/20 and the rears at 60/40 setting. add a set of MT ET Street radials in the 255/60 size range. if you are still not hooking then add a set of caltracs.