454 in 71 blazer? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

MNorby · 10-03-2006, 07:44 AM

Going to put the 454/ TH400/ Doubler into the 71 K5. It is currently in an 83 frame. What do I need to know about motor mounts? Will the ones from the 83 fit? Crossmember clearance? It has HEI and tall valve cover to cleare roller rockers. I am putting a 1" body lift on the rig. Will I need to do some creative BFH mods to firewall to fit it? It also has hedman headers, will they fit? Looking in a jegs mag it looks like the application could be the same. Any other tips regarding the swap?Thanks

10-03-2006, 07:44 AM	#1
MNorby Registered User Join Date: Aug 2006 Location: Powell, Wy Posts: 135	454 in 71 blazer? Going to put the 454/ TH400/ Doubler into the 71 K5. It is currently in an 83 frame. What do I need to know about motor mounts? Will the ones from the 83 fit? Crossmember clearance? It has HEI and tall valve cover to cleare roller rockers. I am putting a 1" body lift on the rig. Will I need to do some creative BFH mods to firewall to fit it? It also has hedman headers, will they fit? Looking in a jegs mag it looks like the application could be the same. Any other tips regarding the swap?Thanks



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