Bellhousing bolts - sizes?

[doctorpimp]

1973 400...
I can't find my starter and bellhousing bolts.  I think I may have left them in an old oilpan that I gave away...

What grade/sizes/lengths do I need?  I'm not concerned with NOS original look 

Thanks 

[doctorpimp]

Ok.  I went and measured them myself.  This is what I figure on:

3/8 course x 1.5" with washer, grade 8 - Qty 5

7/16 course x 2" with washer and lock washer - Qty 2

Am I right?  I'm going to the parts bin tomorrow...

[Back N Black]

Hey Paul,
Where are you working at now?  still at 2 svc Bn?  btw i don't know what size bolts you need.

later
Eldon

[doctorpimp]

Hey Eldon!
How are things?

PM sent 

[John_Kunkel]

Below are the sizes for an automatic:

The top four bolts are 3/8"-16 X 1 1/4" long.


The bottom two bolts are 7/16"-14, the starter side is 2" long and the opposite side is 1 3/4" long.


The starter stud goes on the bottom, it is 7/16" X 2". The top of the starter takes a 7/16"-14 X 1 1/2".

All of the original bolts are the captive washer type and the length measurement is taken from the thread side of the washer to the end of the threads.

[doctorpimp]

Thanks John!
That is exactly what I need!!!

[EccentricMagpies]

I was searching on the site for the bolt size for a 74'  360 / 4spd bell housing.
would it be the same as the 400 that was posted here?


I don't know if my drive-train currently has the wrong length bolts or missing lock washers or what.
3 weeks ago, one bolt came loose by the oil filter and rubbed a hole in the filter.  That happened on a Sunday evening so I dropped it off at a local shop and borrowed a vehicle....  One would think they would have checked the other bolts.  Picked up the car and it's sat since this morning.... today I 'lost' the 2 bolts from the starter.  I was able to get one in without the capability to raise the car, which was enough to start it and get it home.

[EccentricMagpies]

hmmmmm...
actually reading some more posts... TOPIC: Vibration at highway speeds, what are the most likely culprits
I think this is related to the problem with the bellhousing bolts working themselves loose.

Same thing, I see, hwy/speeds ~70mph I get a lot of extra vibration.  I know the throwout is bad but i figured I could hold off on that till the winter comes.. but reading that bit about the '...tranny tailshaft housing bushings..'  I think I'll have a look

great stuff on here!!!
tx