292 to 360 swap..... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1969k10stepside · 04-08-2007, 03:09 PM

Ok,so my 71 4x4 was originally a 292 and now its getting a 360(Bored out 350).So,my question is.....is the crossmember mounted in the same spot as for a 292 or is the 292 mounting location different than one for a 350?I know the 6 cylinders used a different crossmember than one for a V8 but I dont know if the crossmember mounts in the same spot...I already changed to a V8 crossmember so I dont need to worry about that problem.
Thanks in advance.

CPNEJR · 04-08-2007, 04:02 PM

i believe they used a different set of holes for a V-8 which are already there on the frame. not 100% sure about this

CPNEJR · 04-08-2007, 08:19 PM

ttt

**'68OrangeSunshine** · 04-08-2007, 08:24 PM

292s are different from 250s and 230s in that they use a motor mount in the 2nd 2 holes on the drivers side and the first 2 holes on the passenger side. The smaller L6s used symmetrical mounts. The 350 on my '71 GMC is mounted on the back holes. 292s in 4x4s used a 292-only engine mount X-member. I got one from a board member a few years ago for a '72 K/5 project I have on a backburner and the 292 X-member runs diagonally. ['72 K/5 292/SM465/R-T221 -- changing a V8 automatic to L6 manual]. V8s and L6s also used different Z-bars, but if yours is automatic that's irrelevant.
OBTW whatcha ya gonna do with that obsolete 292?

1969k10stepside · 04-08-2007, 08:48 PM

Thanks for the info CPNEJR and '68.CPNEJR,I figured CPNE would jump in and answer this

Since he is doing a 350 to 292 swap.
And '68,the 292,brackets,x member,power steering,and all that are already gone

04-08-2007, 03:09 PM	#1
1969k10stepside Registered User Join Date: Mar 2006 Location: USA Posts: 21,019	292 to 360 swap..... Ok,so my 71 4x4 was originally a 292 and now its getting a 360(Bored out 350).So,my question is.....is the crossmember mounted in the same spot as for a 292 or is the 292 mounting location different than one for a 350?I know the 6 cylinders used a different crossmember than one for a V8 but I dont know if the crossmember mounts in the same spot...I already changed to a V8 crossmember so I dont need to worry about that problem. Thanks in advance. Last edited by 1969k10stepside; 04-08-2007 at 03:11 PM.

04-08-2007, 04:02 PM	#2
CPNEJR Registered User Join Date: Sep 2003 Location: Franconia,N.H. Posts: 1,029	Re: 292 to 360 swap..... i believe they used a different set of holes for a V-8 which are already there on the frame. not 100% sure about this __________________ (Only) Member of the CPNE Fan Club Aint that the truth 67 C-10 350 with 3-speed tranny and 308 gears swb step 82 Z28 Camaro 355 small block over 350 hp and a borg warner super t-10 (blown engine) 72 Chevy K20 Suburban (future project) 70 Chevy K20 now 68 GMC K2500 2003 Chevy 2500hd ccsb 4X4 (daily driver)

04-08-2007, 08:19 PM	#3
CPNEJR Registered User Join Date: Sep 2003 Location: Franconia,N.H. Posts: 1,029	Re: 292 to 360 swap..... ttt __________________ (Only) Member of the CPNE Fan Club Aint that the truth 67 C-10 350 with 3-speed tranny and 308 gears swb step 82 Z28 Camaro 355 small block over 350 hp and a borg warner super t-10 (blown engine) 72 Chevy K20 Suburban (future project) 70 Chevy K20 now 68 GMC K2500 2003 Chevy 2500hd ccsb 4X4 (daily driver)

04-08-2007, 08:24 PM	#4
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,504	Re: 292 to 360 swap..... 292s are different from 250s and 230s in that they use a motor mount in the 2nd 2 holes on the drivers side and the first 2 holes on the passenger side. The smaller L6s used symmetrical mounts. The 350 on my '71 GMC is mounted on the back holes. 292s in 4x4s used a 292-only engine mount X-member. I got one from a board member a few years ago for a '72 K/5 project I have on a backburner and the 292 X-member runs diagonally. ['72 K/5 292/SM465/R-T221 -- changing a V8 automatic to L6 manual]. V8s and L6s also used different Z-bars, but if yours is automatic that's irrelevant. OBTW whatcha ya gonna do with that obsolete 292? __________________ Every 25 years I like to rebuild that 292, whether it needs it or not. Last edited by '68OrangeSunshine; 04-08-2007 at 08:34 PM.

04-08-2007, 08:48 PM	#5
1969k10stepside Registered User Join Date: Mar 2006 Location: USA Posts: 21,019	Re: 292 to 360 swap..... Thanks for the info CPNEJR and '68.CPNEJR,I figured CPNE would jump in and answer thisSince he is doing a 350 to 292 swap. And '68,the 292,brackets,x member,power steering,and all that are already gone Last edited by 1969k10stepside; 12-25-2007 at 09:29 AM.



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