It's the only part car I see some pretty good rust with .. not sure if it's a big deal in day to day rust that can find it's way to more major key structual areas or if I can just blast it off and stop rust it ... The under carriage is fine nothing like the core support tho seems to be like welded in
I'm sorry but I read your paragraph 3 times and I still don't know what you are trying to ask or do.
I tried parsing it out and I still cannot make heads or tails of what you are trying to ask because of your lack of punctuation and failure to use specific nouns.
1) Is it easy or possible to swap out for support in 97?
for support = forward support?
What's a 97? Does this have anything to do with your name (which mentions a 91)
Are you looking for support? What kind of support?
What is easy?
What is possible?
2) It's the only part car I see some pretty good rust with = incomplete thought
You don't see any other part cars?
3) not sure if it's a big deal in day to day rust that can find it's way to more major key structual areas = opinion looking for affirmation + statement.
Not sure what day to day rust is = are you comparing this to some kind of special rust?
4) or if I can just blast it off and stop rust it = statement ...
Sure, you can blast stuff (whatever it is) and stop rust it. Why though? You didn't make the goal clear.
5)The under carriage is fine nothing like the core support tho seems to be like welded in
Again, this is another statement. Without explaining the goal, it's not clear what you are asking.
The only guess I can make is that yes, the forward support is welded in. You can cut it off and weld a new one on.
How much rust is under this specific support can be easily answered with an angle grinder and a pad (if I was going to grab one from a junkyard, I'd bring my Makita with a grinding/sanding disc to check to see how much metal is left after I sanded the rust bit off and if it looked good, I'd use the cutoff discs to take it home with me. It's small enough and easy to bring in to a pick and pull).