Hy seandavis333, welcome, if you mount the 350 using the original front mounts and cast iron bellhousing for the V8 no modification of the clutch pedal/linkage will be necessary. There are many kits available to mount a dual master cylinder and booster setup in the stock location under the floor. Look around on some of the brake system specialist websites, I'm sure you'll find what you're looking for, hope that helps.
