getting my 351C rebuilt got some ?s

[ratio411]

Don't you mean 'hard' instead of "spongy"?

Lack of vacuum will cause a hard pedal, not soft. It can also cause idle problems when pressing the brakes.

 

[porkchop]

alright so if i get a vacuum can, my power brakes and steering should be fine with the 274xe? Thanks to all who have helped me out.

 

[ratio411]

Power steering is unaffected by vacuum.
On your specific car, sounds like brakes are the only issue.
I would try it without the canister first. If you need it, plug it in later... no big deal.
Good luck
Dave