Converting Lower Radiator Mount for V8 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Eagar1 · 09-12-2009, 07:28 PM

My 63 C20 had an I6, and therefore the lower mount as shown in the pic. Should I move the crossmember fwd and moVe the lower mount pads to the lower holes, or can I use the stock I6 location and just use an aluminum radiator for my 350?

**Captainfab** · 09-13-2009, 12:42 AM

No need to move the crossmember. What is shown in the pic is the location of the mounts for a V8 radiator. I'm not sure why yours is that way when it had a I6. Typically the I6 radiators had the lower mounts on the lower portion of that crossmember. How does your radiator look like? Is it a 2 row or a 3 row? A good 3 row radiator with a shroud should have no problem cooling your 350. Of course the aluminum radiators you mentioned will work good also.

SCOTI · 09-13-2009, 01:14 AM

From my searches . . ....

Small I6 = lower mounting on the c.member & small brackets
Big I6/V8 = upper mounting on the c.member & larger brackets

Eagar1 · 09-13-2009, 09:03 AM

It is a C20 and it may have had the larger I6 292, I never did check the numbers. It just seemed like if the mounts were lower you could put a taller(larger) radiator in it, but perhaps with it above the frame rails, you can put in a wider one. I am going to try and find an aluminum one as I will be towing with it and want the best cooing possible. Thanks for the info guys!

joe231 · 09-13-2009, 11:22 AM

the v-8 radiators were/are wider.

SCOTI · 09-13-2009, 11:56 AM

Quote:

Originally Posted by Eagar1

It is a C20 and it may have had the larger I6 292, I never did check the numbers. It just seemed like if the mounts were lower you could put a taller(larger) radiator in it, but perhaps with it above the frame rails, you can put in a wider one. I am going to try and find an aluminum one as I will be towing with it and want the best cooing possible. Thanks for the info guys!

Good reading....
http://67-72chevytrucks.com/vboard/s...minum+radiator

Eagar1 · 09-13-2009, 02:10 PM

Nice link, that looks like the plan, I can probably do something along those lines, in fact my truck will look very similar to his, except for the stance. Thanks again guys!

**MikeN** · 09-14-2009, 10:29 AM

All you need is a V8 upper mount. They are somewhat hard to find, but I eventually got hold of a couple at a swap meet. Most people fab something for an upper mount.

**MikeN** · 09-14-2009, 10:33 AM

Photo of V8 stock upper radiator mount...

09-12-2009, 07:28 PM	#1
Eagar1 Registered User Join Date: Sep 2006 Location: Las Vegas, NV Posts: 169	Converting Lower Radiator Mount for V8 My 63 C20 had an I6, and therefore the lower mount as shown in the pic. Should I move the crossmember fwd and moVe the lower mount pads to the lower holes, or can I use the stock I6 location and just use an aluminum radiator for my 350? Attached Images

09-13-2009, 12:42 AM	#2
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,248	Re: Converting Lower Radiator Mount for V8 No need to move the crossmember. What is shown in the pic is the location of the mounts for a V8 radiator. I'm not sure why yours is that way when it had a I6. Typically the I6 radiators had the lower mounts on the lower portion of that crossmember. How does your radiator look like? Is it a 2 row or a 3 row? A good 3 row radiator with a shroud should have no problem cooling your 350. Of course the aluminum radiators you mentioned will work good also. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE Last edited by Captainfab; 09-13-2009 at 12:45 AM.

09-13-2009, 01:14 AM	#3
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 21,996	Re: Converting Lower Radiator Mount for V8 From my searches . . .... Small I6 = lower mounting on the c.member & small brackets Big I6/V8 = upper mounting on the c.member & larger brackets __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

09-13-2009, 09:03 AM	#4
Eagar1 Registered User Join Date: Sep 2006 Location: Las Vegas, NV Posts: 169	Re: Converting Lower Radiator Mount for V8 It is a C20 and it may have had the larger I6 292, I never did check the numbers. It just seemed like if the mounts were lower you could put a taller(larger) radiator in it, but perhaps with it above the frame rails, you can put in a wider one. I am going to try and find an aluminum one as I will be towing with it and want the best cooing possible. Thanks for the info guys!

09-13-2009, 11:22 AM	#5
joe231 Registered User Join Date: Dec 2007 Location: Palmer, Alaska Posts: 13,821	Re: Converting Lower Radiator Mount for V8 the v-8 radiators were/are wider. __________________ *CHEVY ONLY* Last edited by joe231; 09-13-2009 at 11:22 AM.

09-13-2009, 02:10 PM	#7
Eagar1 Registered User Join Date: Sep 2006 Location: Las Vegas, NV Posts: 169	Re: Converting Lower Radiator Mount for V8 Nice link, that looks like the plan, I can probably do something along those lines, in fact my truck will look very similar to his, except for the stance. Thanks again guys!

09-14-2009, 10:29 AM	#8
MikeN Senior Member Join Date: Oct 2007 Location: Marietta, GA Posts: 799	Re: Converting Lower Radiator Mount for V8 All you need is a V8 upper mount. They are somewhat hard to find, but I eventually got hold of a couple at a swap meet. Most people fab something for an upper mount.

09-14-2009, 10:33 AM	#9
MikeN Senior Member Join Date: Oct 2007 Location: Marietta, GA Posts: 799	Re: Converting Lower Radiator Mount for V8 Photo of V8 stock upper radiator mount...



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