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here we go again 05 5.3 in a 1972 shortwide

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Old 01-30-2009, 03:54 PM
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cool...I have seen the other option posted on here of using the 98-02 Fbody pacesetters..they require denting a few tubes and frame trimming. If you didn't have to dent any tubes then the truck header looks to be a good option. I found the pacesetters for $279 uncoated $399 coated listed on Maryland Speed with free shipping.


Cashed.....I haven't done this swap but I would think you can retain your stock cross member. .may need to move back/forward a few inches and either drill new holes or use a different set of hole in the frame. A 4l80e should be very close to th400 size
Old 01-30-2009, 05:10 PM
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using 4l60e and using the stock crossmember just have to redrill the holes in the frame also i have the engine up and back i did have to cut the trans tunnel and put the high hump in it
Old 01-30-2009, 08:06 PM
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Nice!! Do you have the part number for those headers? How low do they hang under the truck?
Old 01-30-2009, 08:21 PM
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nice work ...do you have pic from the bottom so we can get an idea on how they flow under the truck and how low Thanks keep us posted,
Old 01-30-2009, 09:04 PM
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i will try n get a pic of the bttm tomorrow
Old 01-31-2009, 10:43 AM
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hope this pics help
Old 01-31-2009, 10:54 AM
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They help me, thanks!! I am building a '72 Blazer 4wd with a 5.3. I assume the exhaust will flow similiar to what you have here. Looks great, keep us updated on the pics.
Old 01-31-2009, 11:10 AM
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Sorry for the questions, but are these the headers you have?

Part Number 70-2265
Slip-Fit
Collector Dia. = 3"
02 Bungs included
Full-Length 1 3/4"
Flange Thickness 3/8"
16-Gauge Tubing
Old 01-31-2009, 11:13 AM
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Originally Posted by sandking
They help me, thanks!! I am building a '72 Blazer 4wd with a 5.3. I assume the exhaust will flow similiar to what you have here. Looks great, keep us updated on the pics.
That depends on where you're going to mount you engine, on a 72 4x4 the engine is about 6 inches or so closer to the firewall. Just something to keep in mind.
Old 01-31-2009, 12:40 PM
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here is the part # i have 72C2265
Old 03-16-2009, 05:06 PM
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I think I might make up an excuse to make a trip back down to Clovis once I leave this sand box and come check it out here in a few months, I might even bring Lisa and Cameron down.
Old 03-16-2009, 05:13 PM
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I wonder when this thing will be done?
Old 03-17-2009, 09:38 AM
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I'm glad this thread came back around. I have a friend who is getting ready to start on this same swap in a '69. I printed all of this off for him, (good pictures) but I have a question for *lsxyj* , or anyone else who has done this swap. What did you do about the gas tank and fuel system? It seems to me, that an in tank pump, mounted in the original type tank behind the seat, would make for a very annoying ride. Looking forward to any updates. Ron
Old 03-18-2009, 05:18 AM
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it will get done when i dont have to help someone on his OLDSROLET

as for the fuel tank were going to custom build one to go under the bed in the rear
Old 03-18-2009, 08:52 AM
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Originally Posted by rojs234
I'm glad this thread came back around. I have a friend who is getting ready to start on this same swap in a '69. I printed all of this off for him, (good pictures) but I have a question for *lsxyj* , or anyone else who has done this swap. What did you do about the gas tank and fuel system? It seems to me, that an in tank pump, mounted in the original type tank behind the seat, would make for a very annoying ride. Looking forward to any updates. Ron
I went with a "FuelCellGuy" under bed tank and the fuel system from Mast Motorsports C-10
Old 03-19-2009, 09:36 AM
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Thanks guys. Any other tips you'd care to share?...like, did you do your own wiring harness?... who re-programed your computers?... and the biggest one..if you've completed the swap, how did it turn out..performance wise, and the gas mileage thing?? Ron
Old 03-19-2009, 01:48 PM
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i am going to build my own harness and tune my own computer i wana try and do as much as possable in house
Old 06-03-2009, 08:01 PM
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the firewall is smooth now



Old 03-14-2010, 01:26 AM
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its about time to start back on this truck
Old 03-14-2010, 10:22 AM
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Its warming up now, no excuses!! (I'm in Abq)
Good luck, and show some more good build pics!


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