no model car told. just and engine floating in space. why"? 8 models there are...
we can not see damaged parts
no photo of it posted.
1986 car>? not told but I see 1 post going to 1986 by you. 1 clue only.
stock pump here as vast cars this old have modification and hacks.again we cant see it.
i have never seen a 1 stud pump ever.
the engine block>?
5.0L cutless supreme.? 307
has stinky CARB for fuel and matching mech pump.
the pump has 2 bolts or studs
if you remove the pump
the 2 holes or studs are clearly there
so measure the not broken one.
that is the size for both (inches )
5/16" ! or 3/8" SAE bolts.
take the good one to car parts store.
lay it on the counter and ask for a match.
or run nut Known sizes 5/16? and if fits bingo.
the measure length of good stud. 2"?
end story.
if the old one is seized to the block that means we do ,the 10 page
answer.?
or learn to youtube remove broken stud from a block.
all of this is basic mechanics stuff,
super super basics.
if the stud is stuck I heat it up smoking hot and twist it out with vise-grips.(gloves on leather)
next time post photos of damage.?
nobody can guess what pickle you are in, blind.
sorry . now some examples .
the stud if sheared off clean at cast iron tread boring
those must be easy out removed ezout.
google that see 10000000 hits.
what I do is file bad stud end flat . (a tool)
then center punch it.(a tool)
and drill it out 1/6" cobalt drilled. dead center
then go larger drill to ezout best fit.
beyond this is a 10 page cure. even drilling it out to root thread size 5/16 (root not this) and digging out the old treads. (spiral metal )
tedious.
if stud is still high, (center of it present) there
is a tool called EZ-stud extracter.
note not sheared clean off 100% and flush
see now photos work?
i heat it up red hot on some. (exh. man)
just heating it up red hot and let cool fully
it breaks the internal
rust bond and now comes out 10x more easy.
or as it cools down spray PEN oil on it.
now wd40 ,real PEN oil.
as it cools it creates a thermal vacuum and sucks in the PEN oil. even repeating this me 5 times
I have one this battle.
many times
on one super rare manifold I took it to a special shop
the EDM milled it out. 1 atom at time.
came back like new. but was small manifold no a block
off CJ5, rare parts.
HERE IS EDM DEMO FOR USE ON RARE ENGINES.
OR SMALL MANFOLDS ETC
https://youtu.be/pty-QKRzmeg
MORE
https://youtu.be/m2gm1YDuJU4
IF THERE IS WILL THERE IS A WAY !
IF REMOVING ANY STUD AND THEN YOU THEN END UP EZ-OUT BUSTED, EDM IS THE CURE
OR EVEN START WITH EDM FIRST.
https://youtu.be/tQKxivbsFFE?t=211
END IDEAS , BLIND, OP POSTS NO PHOTOS.