front end swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

snacob14 · 07-04-2007, 11:47 PM

I've got a 70 c20 that i"m looking to convert to five lug and start the drop process. I'm wondering if I can swap a newer front crossmember in from another chevy or GMC to get my five lug pattern. IS the width any different? What problems will I run into down the road with this setup.

bigtruck81 · 07-05-2007, 01:39 AM

73-87 C10 should be almost a direct bolt in

*trkklr77* · 07-05-2007, 01:57 AM

no width issues.

it is a 90% dirrect bolt in. you will need to drill one hole in either you frame or the upper a arm mount[its upto you] and you will need to dril or mod you motor mounts to sit the motor in the same spot.

the way i did it was i used the 73+cross and motor mounts. i was able to get the motor mounts to line up and only needed to waller out 1 hole on each. BUT that pushed my motor back 1" which affects at the tranny crossmember and drive shaft possibly.

if you just move the mount 1" forward and redrill the frame and cross member it will be fine. i dont know what you would have to do if you reuse the ****ty post style motor mounts.

krue · 07-05-2007, 02:03 AM

You should be fine doing it like this, the only snag is swapping rearends to get 5 lug.

snacob14 · 07-05-2007, 10:18 AM

what is the lug pattern on 73-87 fronts 5x?

*Shane* · 07-05-2007, 11:45 AM

5 x 5"

07-04-2007, 11:47 PM	#1
snacob14 Registered User Join Date: Oct 2006 Location: Desoto, MO Posts: 225	front end swap I've got a 70 c20 that i"m looking to convert to five lug and start the drop process. I'm wondering if I can swap a newer front crossmember in from another chevy or GMC to get my five lug pattern. IS the width any different? What problems will I run into down the road with this setup.

07-05-2007, 01:39 AM	#2
bigtruck81 Registered User Join Date: Feb 2004 Location: northern, in Posts: 350	Re: front end swap 73-87 C10 should be almost a direct bolt in

07-05-2007, 01:57 AM	#3
trkklr77 Account Suspended Join Date: Aug 2006 Location: vacaville ca, because it as far from indy as i can be Posts: 775	Re: front end swap no width issues. it is a 90% dirrect bolt in. you will need to drill one hole in either you frame or the upper a arm mount[its upto you] and you will need to dril or mod you motor mounts to sit the motor in the same spot. the way i did it was i used the 73+cross and motor mounts. i was able to get the motor mounts to line up and only needed to waller out 1 hole on each. BUT that pushed my motor back 1" which affects at the tranny crossmember and drive shaft possibly. if you just move the mount 1" forward and redrill the frame and cross member it will be fine. i dont know what you would have to do if you reuse the ****ty post style motor mounts.

07-05-2007, 02:03 AM	#4
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,448	Re: front end swap You should be fine doing it like this, the only snag is swapping rearends to get 5 lug. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

07-05-2007, 10:18 AM	#5
snacob14 Registered User Join Date: Oct 2006 Location: Desoto, MO Posts: 225	Re: front end swap what is the lug pattern on 73-87 fronts 5x?

07-05-2007, 11:45 AM	#6
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	Re: front end swap 5 x 5"



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