radiator selection - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kipps · 12-28-2020, 11:10 PM

Quote:

Originally Posted by kev2809

easy for u truck guys

You mentioned that you were working with a 67 Suburban. Isn't that sitting on the same chassis as a pickup? Is the crossmember arranged different on the 67-72 trucks, compared to the squarebody's? A squarebody is all I've had experience with.

**mongocanfly** · 12-28-2020, 11:36 PM

Kipps... the IH was way off...not even close to center...the C30 wasnt as bad but it didnt line up in the factory shroud..

**kev2809** · 12-29-2020, 05:05 AM

Quote:

Originally Posted by kipps

You mentioned that you were working with a 67 Suburban. Isn't that sitting on the same chassis as a pickup? Is the crossmember arranged different on the 67-72 trucks, compared to the squarebody's? A squarebody is all I've had experience with.

isnt the cross member riveted in? either way, it seems like a tight squeeze to get that cross member out and drill new holes under there with the body on

ls1nova71 · 12-29-2020, 06:06 AM

Manual transmission crossmembers are riveted in, automatics are bolted in. Drilling new holes isn't that hard on the bottom of the frame, but the top ones can be tough. A lot of people don't bother bolting it at the top though.
If you have a manual transmission crossmember you will have to remove it.

kipps · 12-29-2020, 09:22 AM

I pulled and reinstalled two transmissions on these classic trucks. Both were manual. A 1987 chevy 4wd, and a 1981 Ford 2wd. The chevy was missing the extra brace pieces that went to the top flange on the frame rail. I didn't worry about it. The Ford had those braces, but I don't remember if I bothered to reinstall them or not.

Just drill new holes in the bottom frame flange, and call it good. It's not worth the trouble attaching it to the top flange, in my opinion.

As far as rivets vs bolts, it'd be REALLY unhandy to do a clutch job without removing the crossmember. Probably impossible on some transmissions. If there's rivets there, cut them off, and replace with bolts.

ls1nova71 · 12-29-2020, 10:00 AM

I should have been more specific, the crossmembers are riveted in on manual transmission equipped Chevy and GMC trucks from 67-72. I suspect they stopped doing that in 1973 when the body style changed.

kipps · 12-29-2020, 10:07 AM

Quote:

Originally Posted by ls1nova71

I should have been more specific, the crossmembers are riveted in on manual transmission equipped Chevy and GMC trucks from 67-72. I suspect they stopped doing that in 1973 when the body style changed.

Makes sense. Thanks for the clarification.

**kev2809** · 12-29-2020, 10:53 AM

ah ok good info. i didnt even pay attention while i was under there. guess its coming out then

ls1nova71 · 12-29-2020, 11:14 AM

Quote:

Originally Posted by kev2809

ah ok good info. i didnt even pay attention while i was under there. guess its coming out then

Your truck is an automatic, right? If so, you can use the crossmember you have, just slide it back and drill new holes to bolt it back in.

**kev2809** · 12-29-2020, 04:09 PM

Quote:

Originally Posted by ls1nova71

Your truck is an automatic, right? If so, you can use the crossmember you have, just slide it back and drill new holes to bolt it back in.

yup it is auto. ill pull it out to paint it. i dont know why i thought these were riveted in

racecougar · 01-22-2021, 11:20 AM

https://67-72chevytrucks.com/vboard/...&postcount=611

Been running that setup for almost 4 years now, and it has worked very well. Currently installing a Vintage Air system and finally painting the front clip.

12-28-2020, 11:36 PM	#27
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,670	Re: radiator selection Kipps... the IH was way off...not even close to center...the C30 wasnt as bad but it didnt line up in the factory shroud.. __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

12-29-2020, 06:06 AM	#29
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,119	Re: radiator selection Manual transmission crossmembers are riveted in, automatics are bolted in. Drilling new holes isn't that hard on the bottom of the frame, but the top ones can be tough. A lot of people don't bother bolting it at the top though. If you have a manual transmission crossmember you will have to remove it. __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

12-29-2020, 09:22 AM	#30
kipps Registered User Join Date: Jul 2014 Location: North-central Virginia Posts: 1,104	Re: radiator selection I pulled and reinstalled two transmissions on these classic trucks. Both were manual. A 1987 chevy 4wd, and a 1981 Ford 2wd. The chevy was missing the extra brace pieces that went to the top flange on the frame rail. I didn't worry about it. The Ford had those braces, but I don't remember if I bothered to reinstall them or not. Just drill new holes in the bottom frame flange, and call it good. It's not worth the trouble attaching it to the top flange, in my opinion. As far as rivets vs bolts, it'd be REALLY unhandy to do a clutch job without removing the crossmember. Probably impossible on some transmissions. If there's rivets there, cut them off, and replace with bolts. __________________ 1987 C6P V20 truck, 2010 LMG 5.3, AFM delete, 2010 Camaro exhaust manifolds, 1997 nv4500, 1991 np241c, hydroboost, 2005 14bff axle & driveshaft, drop-n-lock gooseneck, 4.10 gears, stock suspension, rims, and tires. Still a work in progress. Any questions or suggestions are welcome!

12-29-2020, 10:00 AM	#31
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,119	Re: radiator selection I should have been more specific, the crossmembers are riveted in on manual transmission equipped Chevy and GMC trucks from 67-72. I suspect they stopped doing that in 1973 when the body style changed. __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

12-29-2020, 10:53 AM	#33
kev2809 low n' slo Join Date: Mar 2009 Location: rosenberg, texas Posts: 5,175	Re: radiator selection ah ok good info. i didnt even pay attention while i was under there. guess its coming out then __________________ 67 1/2 ton Suburban - Project DRGNWGN. Build thread -_--_--_ _________ _--_-_ -/____\|__\|__\__ ,.,,,.,.,,.,\|_O _______ O_]

01-22-2021, 11:20 AM	#36
racecougar Registered User Join Date: Jan 2013 Location: Imperial, MO Posts: 1,003	Re: radiator selection https://67-72chevytrucks.com/vboard/...&postcount=611 Been running that setup for almost 4 years now, and it has worked very well. Currently installing a Vintage Air system and finally painting the front clip. Attached Images __________________ Rod @ AzzKicker Cars 1965 C10 SWB - Build Thread



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