73-87 Motor mounts for inline 250 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jcramsey · 06-28-2017, 12:00 PM

Just swapped a 73-87 crossmember into my 62 to replace the torsion bar setup and I'm looking for the proper motor mounts to use for my inline 250. I've got the mounts that go from the crossmember to the frame. Just trying to confirm what the engine brackets look like. This is a pic I found online....I think this is what I'm looking for, correct? Also does anyone make these or am I just going to have to find someone parting out one of these old trucks?

Thanks!

jcramsey · 06-29-2017, 10:51 AM

Looks like my picture was dead...trying again

ray_mcavoy · 06-29-2017, 11:40 AM

Yes, the engine bracket shown in your picture is the style you need to work with 73-87 mounts.

I've seen reproductions available for V8 applications but I don't think anyone makes them for the inline sixes. So those are probably going to be something you'll have to get from a donor truck or from someone who has done a 6 to V8 swap.

The "clamshell" mounts (that go between the brackets on the frame & the brackets on the engine) are readily available from most auto parts stores and restoration parts vendors.

jcramsey · 06-29-2017, 11:48 AM

Thanks for the confirmation ray, I appreciate it!

**MikeB** · 07-01-2017, 02:46 PM

These may be the motor mount-to-engine brackets for 79-84 250 six.

334609 LH, bracket, engine mount
334610 RH, bracket, engine mount

I found the info here: http://www.gmpartswiki.com/getpage?pageid=55184

Also, as I recall from my 250 six to 350 swap in my 82 C10, the motor mounts should be bolted to the lower set of holes on your mount-to-frame brackets.

You will probably have to call junkyards, because I can't find any links to the above P/Ns on Google, except for the gmpartswiki site. I had a pair 3 years ago, but gave them to the guy who bought my 250 six. I bought some things from a guy on eBay who parts out these trucks. If I can find him, I'll send you the info.

Edit: Just found this picture of my old engine. Bracket is different than a V8 clam shell.

**MikeB** · 07-01-2017, 03:14 PM

OK. Here's the guy on eBay who parts out square bodies:
http://www.ebay.com/usr/rayandsamant...72.m2749.l2754

jcramsey · 07-01-2017, 10:06 PM

Awesome! Thanks for the info Mike!

06-28-2017, 12:00 PM	#1
jcramsey Registered User Join Date: Jun 2011 Location: Marion, NC Posts: 851	73-87 Motor mounts for inline 250 Just swapped a 73-87 crossmember into my 62 to replace the torsion bar setup and I'm looking for the proper motor mounts to use for my inline 250. I've got the mounts that go from the crossmember to the frame. Just trying to confirm what the engine brackets look like. This is a pic I found online....I think this is what I'm looking for, correct? Also does anyone make these or am I just going to have to find someone parting out one of these old trucks? Thanks! Attached Images __________________ The Egg Hauler The Government Mule Last edited by jcramsey; 06-29-2017 at 10:50 AM.

06-29-2017, 10:51 AM	#2
jcramsey Registered User Join Date: Jun 2011 Location: Marion, NC Posts: 851	Re: 73-87 Motor mounts for inline 250 Looks like my picture was dead...trying again __________________ The Egg Hauler The Government Mule

06-29-2017, 11:40 AM	#3
ray_mcavoy Registered User Join Date: Nov 2009 Location: Sherman, ME Posts: 2,366	Re: 73-87 Motor mounts for inline 250 Yes, the engine bracket shown in your picture is the style you need to work with 73-87 mounts. I've seen reproductions available for V8 applications but I don't think anyone makes them for the inline sixes. So those are probably going to be something you'll have to get from a donor truck or from someone who has done a 6 to V8 swap. The "clamshell" mounts (that go between the brackets on the frame & the brackets on the engine) are readily available from most auto parts stores and restoration parts vendors.

06-29-2017, 11:48 AM	#4
jcramsey Registered User Join Date: Jun 2011 Location: Marion, NC Posts: 851	Re: 73-87 Motor mounts for inline 250 Thanks for the confirmation ray, I appreciate it! __________________ The Egg Hauler The Government Mule

07-01-2017, 02:46 PM	#5
MikeB Senior Member Join Date: Jul 2000 Location: North Texas Posts: 3,597	Re: 73-87 Motor mounts for inline 250 These may be the motor mount-to-engine brackets for 79-84 250 six. 334609 LH, bracket, engine mount 334610 RH, bracket, engine mount I found the info here: http://www.gmpartswiki.com/getpage?pageid=55184 Also, as I recall from my 250 six to 350 swap in my 82 C10, the motor mounts should be bolted to the lower set of holes on your mount-to-frame brackets. You will probably have to call junkyards, because I can't find any links to the above P/Ns on Google, except for the gmpartswiki site. I had a pair 3 years ago, but gave them to the guy who bought my 250 six. I bought some things from a guy on eBay who parts out these trucks. If I can find him, I'll send you the info. Edit: Just found this picture of my old engine. Bracket is different than a V8 clam shell. __________________ Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, recent AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! Last edited by MikeB; 07-04-2017 at 11:01 PM.

07-01-2017, 03:14 PM	#6
MikeB Senior Member Join Date: Jul 2000 Location: North Texas Posts: 3,597	Re: 73-87 Motor mounts for inline 250 OK. Here's the guy on eBay who parts out square bodies: http://www.ebay.com/usr/rayandsamant...72.m2749.l2754 __________________ Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, recent AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!

07-01-2017, 10:06 PM	#7
jcramsey Registered User Join Date: Jun 2011 Location: Marion, NC Posts: 851	Re: 73-87 Motor mounts for inline 250 Awesome! Thanks for the info Mike! __________________ The Egg Hauler The Government Mule



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