shelbysnake Tony there are no real problems, it's a swap as long as the flywheel has a "0" balance. You might have to go to a local machine shop and have the one you use in the car checked. If it comes out "0" swap them, If not the machine shop will index the old one and add or remove weight to match the new one. Most motors are now "0" balanced. I don't think you are using a SCJ428 crank shaft in the car. There would be counter weight on the front of the motor. If you goggle this crank shaft, there should be pictures to show you what I mean. This is old school.
The swap is simple. Would replace all bolts with ARP flywheel and pressure plate bolts. Need a 1/2" torque wrench to tighten to spec. Would just need a clutch disc installer to center this to slide in trans. The rest is basic nut and bolt up. Make sure that the pilot bushing or bearing looks ok in the back of the crankshaft. You didn't say how many miles are on the car or motor but would think the alignment of the bellhousing is centered. It wouldnot hurt to check.
Last thing is the starter, Do youknow if we are running a lakewood bell housing?? This is very important. weights about 50 pounds and has a plate that bolts to it. Unless the starter bolt directly to the bellhousing without a block saver plate we are going to need to check the stater engagement. If it's a quicktime unit, I don't have info for this. Problem is the plate on a lakewood doesn't let the starter drive engage the complete teeth to teeth. Maybe 1/2 of the teeth depth are being used and strip out the flywheel gear and starter drive over time. Alot of guys have been through this here. I myself have modified my bellhousing for this problem and replaced a drive in the starter. Can you take a pictures of the 2 drives and send them here. Pictures wil tell use if you have a problem and this is why the failure happened. If you send me a pm with phone and good time to call, I can walk you though this for the fix. We need to check the centering of the bell housing with a caliper and magnetic stand. Can get one cheap that will work at a harbor freight. Rick L. Ps if you have silly money and a good mechanic, take it to a garage and spend the day. You want to see the bellhousing checked.
Good luck.