Need help identifying front subframe

I ended up finding out my Camaro clip was a '76 by the stamping on the upper A arm. Most parts are interchangeable, but some won't mix. I thought mine was a '74 until a Camaro dude told me to check those stampings.

 

uhhh....no.....not by about 3/8" of an inch

 

Yeah I had a feeling that was way off. I'm going to clean up the control arms and see what I find.

 

Something is way off on the metric to inch conversion. .5 mm ls about .020".

 

you're my boy blue! yes the difference in diameter between my old ball joint and new ball joint is approximately 0.02". Seems very small but it's giving me a lot of trouble.

 

That would be the difference between "stock" and the "repair " ball joint..
What I have had to do in the past is use a flapper wheel in the diegrinder to clean up the hole in the a-arm..
On some of our dirttrack cars we have to tack weld the ball joint into the a-arm, so if you take off a little too much...No big deal.. the weight of the car holds the balljont in place when the wheels are on the ground.
Open the hole up a little and press it in...
Dave
( looks like the mfgs are consolidating the #s....the last 2nd gen camaro is 30 years old!!!) not a lot of them left on the road, compared to the millions that were built..

 

Thanks Dave, this is exactly what I am doing. I busted out the sand paper and found casting number 371875L on my spindle which I traced to a 2nd gen camaro. Gonna clean up the A arm and pop that ****er in