SBC engine mounts for HR crossmember.

FCOV6 · Post by **FCOV6** » Wed Nov 18, 2009 1:29 pm

although i have a Buick V6 for my FC i would like to keep my options open since my bellhousing has chev pattern as well, can i buy pre made mounts ready to weld to my hr crossmember ?

mrs ratbox · Post by **mrs ratbox** » Wed Nov 18, 2009 2:34 pm

box tube

FCOV6 · Post by **FCOV6** » Wed Nov 18, 2009 5:22 pm

ratbox wrote:box tube

Ok, but i have no idea what they look like ? Well i do sort of ,most of the ones i've seen are a triangular shape with a horizontal tube at the top.

nosferatu · Post by **nosferatu** » Thu Nov 26, 2009 8:25 pm

The "box tube" for Chevy engine mounts is 65mm square tubing with 3mm wall thickness. Make a template, cut it to length and weld it to the cross-member. Depending upon your engine location you may have to fabricate plates that extend forwards from the original mounting point on the block so it lines up above the cross-member - the rubber mounts are then bolted to this plate. These pics might help.

FCOV6 · Post by **FCOV6** » Fri Nov 27, 2009 12:27 pm

nosferatu wrote:The "box tube" for Chevy engine mounts is 65mm square tubing with 3mm wall thickness. Make a template, cut it to length and weld it to the cross-member. Depending upon your engine location you may have to fabricate plates that extend forwards from the original mounting point on the block so it lines up above the cross-member - the rubber mounts are then bolted to this plate. These pics might help.

Excellent, thankyou. Are they towards the front or rear of the crossmember ? need to clear my front mounted rack steering shaft as well.

nosferatu · Post by **nosferatu** » Fri Nov 27, 2009 12:59 pm

Ours are placed to the rear of the cross member but we're running a rear mounted rack. Sorry we can't give you a magic formula for exactly where yours should be - each build will be different depending upon engine and steering choice etc. All you can do is research what others have done and make your own decisions based on your build requirements. Good luck with it!

FCOV6 · Post by **FCOV6** » Fri Nov 27, 2009 1:07 pm

nosferatu wrote:

Ours are placed to the rear of the cross member but we're running a rear mounted rack. Sorry we can't give you a magic formula for exactly where yours should be - each build will be different depending upon engine and steering choice etc. All you can do is research what others have done and make your own decisions based on your build requirements. Good luck with it!

Thanks again, my original red motor engine mounts are where yours are now but i need to move mine forward to clear the steering shaft , the plate idea is what i'll need to do anyway.

nosferatu · Post by **nosferatu** » Fri Nov 27, 2009 2:05 pm

no problems - glad we could help - even if only in a small way!

FCOV6 · Post by **FCOV6** » Fri Nov 27, 2009 4:28 pm

The V6 looks good sitting there, should have mine buick in for trial after xmas.

FCOV6 · Post by **FCOV6** » Tue Dec 08, 2009 2:02 pm

Kathi/ John, what radiator are you using, the buick has the inlet/ outlets in the same posi so a commy rad doesnt work unless i get it modified with different tanks. also what engine mounts are you using ?

nosferatu · Post by **nosferatu** » Sun Dec 13, 2009 9:59 am

We are using a VH V8 radiator with the outlets to suit small block as we already had it from another project. Its a difficult fit (a fair bit of cutting and shutting) but should work extremely well.

The engine mounts are HK/T/G chev mounts (got them from my spares box) and they fit perfectly over the 65 mm square tubing risers from the cross member.

Good luck with the build.

John and Kathi

FCOV6 · Post by **FCOV6** » Wed Dec 16, 2009 2:07 pm

nosferatu wrote:We are using a VH V8 radiator with the outlets to suit small block as we already had it from another project. Its a difficult fit (a fair bit of cutting and shutting) but should work extremely well.

The engine mounts are HK/T/G chev mounts (got them from my spares box) and they fit perfectly over the 65 mm square tubing risers from the cross member.

Good luck with the build.

John and Kathi

Great, just 2 more questions. what diameter is the bolt hole and how tall are the box mounts ?

nosferatu · Post by **nosferatu** » Wed Dec 16, 2009 9:37 pm

Bolts used in ours are 7/16".

Length of box mounts depends on the position of the motor. This includes your rack set up, sump clearance and the angle of the motor to suit the pinion angle of your diff.

Temporarily mount the motor by supporting it with jacks, blocks of wood etc to determine the best position for your application then make cardboard templates that can be transferred to the box tubing and cut to size. It's best to cut it a little longer and then trim as required with a grinder - easier to remove than add!

Make sure you put a crush tube to take the 7/16" bolt in the box tubing and weld a covering plate over the end of the tube to stop any crap getting in there.

It can be a little time consuming but a afternoon should do it. Hope this helps

John and Kathi

FCOV6 · Post by **FCOV6** » Wed Dec 16, 2009 10:23 pm

Thanks, once i have my spare blocked bolted up to the bellhousing i can work out the position/length of the tube and from your pics the chev is very similar in width so i think i'll be using the hk/t/g type chev mounts with plate adapters. Bought these little beauties from the US which will dress up the motor nicely.