The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 1971 C-20 Longhorn SM420 to 700R4 conversion

naystcb · 05-26-2013, 09:29 PM

I am swapping out the SM420 in my 1971 Cheyenne Longhorn C-20 with a 700R4 and need to know if and what type of flexplate or flywheel I need to get to make this conversion work or can I use existing flexplate? Please advise.

05-26-2013, 09:29 PM	#1
naystcb Registered User Join Date: Nov 2011 Location: Orange, California Posts: 17	1971 C-20 Longhorn SM420 to 700R4 conversion I am swapping out the SM420 in my 1971 Cheyenne Longhorn C-20 with a 700R4 and need to know if and what type of flexplate or flywheel I need to get to make this conversion work or can I use existing flexplate? Please advise. __________________ I gave up my wife for my Chevy truck!