[QUOTE=JPD1stVette]My two cents - I recently replaced the engine mounts in the 81 and found out there is a difference between each retailer's mount. I ended up buying locking type from Paragon. They looked and fit like the originals. Also, you might find the bolts in different lengths. [/QUOTE]

Hi Dave, I had problems with motor mounts pulling apart. Ended up with Energy Suspension from Jegs. No problems since. Also did trans mount.             Dick

DaveM,

Dave, I have a ZZ4 engine that I used Energy Suspension mounts from Summit. I also have Hooker side mount headers. The engine is in place for my trial fitment of the headers, and also to set up the side pipe mounts. I also had to fabricate a spot for my o2 sensor. So......long story short.......they fit! The heads on the ZZ4 are Edelbrock Aluminum Vortec (E-tech 170). Summit Racing sells motor mounting shims for problems that occasionally occure. Hopefully the new mounts that you ordered will solve your problems. Also as Joel already pointed out....there is a definite offset to the engine/ transmission.....moving it over to the passenger side. Chevy evidently needed room for incidentals like; steering, master cylinder/power booster, three pedals for the driver etc. Good Luck.....it'll all work out!   corvette440hp2008-01-20 10:12:57

Hi Dave, I work part time at a custom exhaust shop and we run into headers that don't fit the way they should. Some are sent back and some we have to tweak a little, if you know what I mean. Your mechanic is probably right. Contact your supplier or manufacturer for replacement. Dick

For what it's worth the photoshows two old motor mounts with the new Paragon mount and bolt in between. I tried NAPA replacement mounts and found they didn't fit too.

We have sold countless Paragon manufactured locking mounts.  I used them on the Great Pumpkin.  We have not had a problem.  It sounds like everyone agrees that the problem is the headers, especially since he feels the head flange is tweaked.  They get a lot of abuse in shipping, if they weren't already bad when they left the factory.  Hooker has a good reputation, but anyone can make a mistake.

I'm going to put in the paragon mounts first and see what happens. If they still don't fit then I'll be calling Jet-Hot.

Man I can't catch a brake. I got an e-mail from Paragon telling me those mounts are on back order

I feel your pain, Dave. I had to wait for mine too for about a week or so.