That is probably the smartest decision you have aver made.
But, there are lots of details to be attended to in attaching a turbo to a slant six, and lots of different ways to go about it. There are people on this forum who have experience and knowledge about ll this, who will GLADLY help you accomplish this, and will be really useful in helping you to get this done.
First off, you need to tell us what kind of performance you are looking for, so we can help you do this as cheaply as possible.
Write a short description of how you'd like to get this car to run, once it's operational with the turbo. That is, do you want it to run like it had a stock 340 in it, or faster???
You see, it can have as much or as little performance as you want for it, but getting it to that point is all about the "build." If you can be happy with a 14-second car, you may not even have to pull the head off it.
If you'd like to have a low 13-second car, it will be more involved.
Just tell us how you want it tor run... You can, with enough time, money and effort, turn that slant six into an engine that will scare you... LOL !
Let us know what you want... we'll be waiting! :cheers: