My air pump check valve (Ford: E9VE-9A487-AB) that attached
to the pipe leading to the heads broke off the pipe at the nut
on my 93 Mustang GT.

When I attempted to remove the nut off the pipe, I bent/crimped the
pipe between the elbow of the pipe and the threads where the nut
from the air pump check valve would attach; the bend/crimp is
closer to the threads than to the elbow and having cut the pipe
toward the elbow I now can see the bend/crimp has only reduced the
"ID" of the pipe by 20%.

I have successfully removed the old nut from the threaded end of
the pipe and attached a new air pump check valve to the old end of
the pipe.  My plan is to now re-attach the end of the pipe to the
rest of the pipe with a high-temperature hose and hose clamps

All things considered, is this a stupid idea or should I simply
replace the pipe?

Replacing the pipe seems to be a pain in the butt since there is
not a lot of space to remove the bolt holding the pipe to the block
nearest the valve; although the other bolt seems to be more
accessible.  (If I have to replace the pipe, are there any tricks
to removing the two bolts that attach the pipe to the block?)

Any thoughts or suggestions would be greatly appreciated.

Thanks!

Joe