is it all worth it?

Can,t the older front ends install on the newer cars ?

Forget how it came from the factory, make the car how you like it to be. They are so old now few folks would noticed any how.

I would go for a factory V8 car over the 6 slant. Maybe not anymore but in the old days the insurance companies hated seeing a factory 6 cylinder car converted over to a V8, they used to refuse to insure it. Said the car was not design to handle the extra power