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10-03-2006, 07:44 AM
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#1 |
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Registered User
Join Date: Aug 2006
Location: Powell, Wy
Posts: 135
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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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10-03-2006, 03:07 PM
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#2 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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Re: 454 in 71 blazer?
the 83 frame will throw a curve in our advice, but the 4X4 trucks never had big blocks. The way most ppl do it is with a body lift, and i think one inch won't be enough... eso with the tall valve covers.
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10-03-2006, 06:25 PM
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#3 |
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SWB 4x4 Collector
 
Join Date: Jun 2001
Location: Osage City, KS
Posts: 5,156
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Re: 454 in 71 blazer?
use a 73+ crossmember moved up I think 2" from stock holes.... use the better 73+ motor mounts with the crossmember and maybe get a electric fan setup from the junkyard.... to compensate the engine being close to the radiator. Hope this helps. You might still have the massage the firewall just a bit to fit the taller valve covers. Trevor
__________________
TREVOR  1970 CST swb 4x4 (speedwarning,cruise,tilt,tach,8track, original red shoulder belts,tow hooks) 1972 Jimmy (soon to be Hickey cloned)1971 Cheyenne Super 4x4 swb (tilt,tach,buckets, original blue shoulder belts,am/fm,cruise,tow hooks, dealer 8 track) 1972 Cheyenne Super K20 4x4 Custom Camper (tilt, tach, am/fm, tow hooks, bed toolbox, aux gas tank1972 Cheyenne Super Crew Cab K30 4x4 Duramax, Allison, np205, buckets, tow hooks (CURRENT PROJECT)http://67-72chevytrucks.com/vboard/s...d.php?t=624819 1989 V3500 Crew Cab (454tbi, NV4500, np205)1970 Chevelle SS (LS5 454,th400,8track,buckets,tach):2004 Jeep Wrangler Rubicon (daily driver) WTB: 1968-70 Cruise Control Lever |
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10-03-2006, 06:37 PM
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#4 |
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Registered User
Join Date: Aug 2006
Location: Powell, Wy
Posts: 135
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Re: 454 in 71 blazer?
It is going into a 71 framed K5 but coming out of a 83 truck with headers and all for a 80s style truck. I could take the crossmember out of the 83 frame too if needed. I already run ford windstar electric fans so that might give me some clearance and I have a 1" body lift already rounded up. Basically would it be best to use the 83 crossmember/ mounts and if so or not what about moving the crossmember forward? Also header clearance, tall valve cover clearance and distributor clearance? Thanks again!
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