motor mounts
 

Ok It's kinda stupid question but none of the dumb a@# people at the auto store can help or help them selfs IMO. I need to know the size, length etc for the motor mount bolts. I bought a beater for work and I noticed that there is no bolt connecting the motor to the frame. He said he just swapped it in and couldn't get it running. All that was wrong was he didn't run a power wire to the HEI he swapped in. :p He was a little mad when I gave him $200 dollars and spent 10 min under the hood and drove it home. :D Can any body just give me the correct size. Oh yea it's a 350 if that matters. Thanks in advance,
Brian

The ones from the stands to the frame,and the mounts to teh block are all 3/8,and the ones from the stands to the mount are 1/2 inch dia.Not sure on exact length,prolly inch and a half,use a flat washer on the stand to mount bolts.

The motor mount to block bolts are 3/8-16 x 3/4", (anything longer will possibly bottom out). The frame to motor mount bolts are 7/16-14 x 1"
long.

If you are installing new motor mounts be sure to check the threaded hole as some of the aftermarkets are tapped with a metric thread. (They can be rethreaded to 7/16-14).

JIm

Thanks that helps alot. How about the long bolts? The ones that connect both mounts together?

You must have clamshell mounts. I don't know the size, but I think they may be 5 to 6 inches.
Todd

He shouldn't have clamshell mounts. I think he's talking about the bolt that goes through the frame stand and into the rubber mount.

The frame to motor mount bolts are 7/16-14 x 1" long unless he has the clamshell style.

Jim

Right on ;) crazyL :burnout:

5/8 head. 7/16 x 5" thread.

He could have the clamshell mounts. Depends on if the origianl owner swapped from a BB engine to a SB. Also, some of the SB frame mounts from the 73-87 trucks bolted in and were set up for the clamshell mounts. I had a pair that I got a while back. I compared them to the 72 BB mounts in my frame at the time and they bolted in exactly, just the mount looked a little different. When the engine has been changed, all bets are off as to what is in there now. That would explain why the Autozone boneheads couldn't help. They only know what's on the computer screen.

Thanks for the info. jmanz69 is correct the po did swap out the og 396 for a 350. Thanks again you guys are great!!!!!