1968 Formula S...modify it beyond return?

I have a 1968 Formula 340 S from California. Original engine is long gone. I have been running it with a 1970 block 416 last 5 summers. Car is great but I am ready to take it to next level. Do you guys think it matters if I add sub frame connectors and mini tubs to this car? It is kind of a rare vehicle but it doesn't seem like the general public really cares about preserving this model. It will never be original again as the motor is not original. What do you think? I have original exhaust and intake manifolds sitting in the garage and the rest of the car is fairly stock other than motor,wheels and paint.

Since it is your car, and isn't a number matching and never will be, Formula S or not a 68 Barracuda is a 68 Barracuda, not a high dollar E body that is highly sought after.

Weld in frame connectors, yep go for it, mini tub, well if you need more tire just don't cut into the interior so it is an outside visual only.

IMO both are moot point on these cars. As far as resale value, don't expect it to increased he value and remember it will reduce the potential buyer when time to sell

If I remember correctly you had it for sale. If you like the car but want to up the game you have the car to do it with. If you really don't like the car and are doing this to find out if you like it better with big meats on the back, you might be wasting your time and money.

I like the look of the car less the stripe but that is just me.

Good luck whichever way you go!

Remember we like pictures if you are going to build it