Engine mount bolts - where to buy?

[Praxiss454]

I have a handful of unusually sized bolts I am still looking for to finish out my rebuild and reinstall on my Chevy 230. My local hardware store doesn't have them. All course thread. When I say "shoulder" I just mean that that is the length of unthreaded shaft beneath the head before the threads start.

Front Engine Mount:
Two 7/16" x 1 1/2" bolts with a 1/4" shoulder, don't recall if tapered tip (but probably?)

Rear Engine / Trans Mount:
Two 1/2" x 3 3/4", with ~2 1/8" shoulder, tapered tip

Bell housing (the takeoffs all looked newer, so these might not even be right size)
Two 3/8" x 2 1/4", with 1" shoulder
Three 3/8" x 1 1/2", with 1/2" shoulder

Flywheel (not flywheel to crank, those are fine thread. forget where these are from but I'm sure it will become obvious when I try to do final assembly)
Six 3/8" x 1", with 3/8" shoulder

Transmission to Engine
Two 1/2" x 1 3/8", no shoulder
Two 1/2" x 1 3/4", 3/8" shoulder plus nut

I have replaced all the other bolts in my rebuild, feels weird to leave these ones as original. I guess I can. I could just run them through a die and call it a day but would prefer to replace.

Anyone know where to find these?

[mongocanfly]

Do you have a fastenal close to you? I wouldnt worry about the shoulder length as long as the threads dont bottom out...
Mcmaster carr also has a good selection of bolts....get the high grade bolts...not the elcheapos...

[Praxiss454]

Originally Posted by mongocanfly

Do you have a fastenal close to you? I wouldnt worry about the shoulder length as long as the threads dont bottom out...
Mcmaster carr also has a good selection of bolts....get the high grade bolts...not the elcheapos...

Yep there is a fastenal not too far from my work. I'm looking at their website now. I wasn't sure if the shoulder mattered.

[Praxiss454]

Well it's pretty nice to be able to browse online and find (damn close to) the exact bolts I'm looking for, and have them delivered to my local branch for free. Thanks for the suggestion. A few of them they didn't have shouldered versions of, but they had all the weird 1/4" increment lengths I needed.

[Captainfab]

The shoulder length is not a part of the specs when specifying a bolt. The diameter, thread pitch, the length under the head, the grade and the configuration of the head are how you specify a standard bolt.