I6 to 454 Swap?
I have the Gen IV 454 and a TH400. It came out of a 90 or 91 truck. Other than frame mounts needing to be moved. What other issues do i face? Will the Oil pan clear or do i need a new one? I assume i have to have another set of headers as well? OH to add the engine is complete with all the accessories as well. Any input would be greatly appreciated.
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Re: I6 to 454 Swap?
for the most part bolt in with the correct frame mounts and engne mounts for the new truck its going in .
and yes exhaust / some small little parts / but to be correct the front coils from I6 to big block are different part #'s for the heavy engine . so if keeping it stock then coil swap . if lowering it try it and or get the correct coils as to desired height . the rad will need swapped also with the shroud as the big block is a 3 or 4 core over the little one for the 6 cyl . watch for drive shaft length . and the th400 is prob a 32 spline rear output for the drive shaft yoke over the 27 spline from the old drive-line combo . |
Re: I6 to 454 Swap?
I don't know about the later models, but my 73 454 and my current 83 454 both used standard V8 truck radiators which were 2 core, but they were thicker than most radiators. The one I currently have in the 83 came from AutoZone and is a thicker 2 core aluminum and plastic one from Spectra. It cools fine in the 100+ degree desert heat. I have given up on copper/brass radiators.
Personally, I would stay away from headers, since the BB takes up a lot of under hood space as it is, but I know a lot of people like headers anyway. |
Re: I6 to 454 Swap?
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Re: I6 to 454 Swap?
Which l6 engine do you have now?
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I'm not sure what the roads are like in Greer but if you drop that rat motor in your truck and don't change your front springs your gonna bottom out your suspension and maybe wipe out your lower control arms.
If your gonna lower the truck do it the correct way and either get drop spindles or dropped coil springs for a BBC C10. Don't use the weight of the engine to lower the vehicle and expect it to work like it was designed to. |
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Just an update that the I6 is out and the 454 is resting in place. Working through the TH400 conversion at this point. Hope to have it up and going by end of the week.
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dont forget the kickdown switch on the gas pedal mount under the dash for the th400
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Hey just done same swap in my 73 swb step few months back send me a pm if you interested in checking it out I'm about hour away from you
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th400 uses a kickdown switch for the passing gear drop in the trans when you floor it .
th350 uses a cable for this function . info for pano : and if swapping a 350 sbc to a 454 chevy its a virtual bolt in swap minus drive brackets for the alt/ p/s pump and such along with the exhaust . now if your 87 350 is fuel injected like the factory tbi system you will need those parts and computer to make it run correctly . otherwise its a custom burnt chip or carb or aftermarket system . |
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1 Attachment(s)
Currently what the truck looks like now
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Very Nice!
If you haven't already, I would also look into changing at least your front disk brakes. The 6 normally came with the smaller/thinner rotors. If your changing spindles, get ones that will work with the 1.25" rotor. There is a lot more go in thrat truck now, so some wwhoah would be good. |
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Nice!
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when i built my rear axle i did the optinial BIG drum size in the rear . had to score a set of 4x4 10 bolt rear backing plates . then i ordered drums / shoes / hd-kit all for the big option size . went together just fine on my older 12bolt rear 5 lug . went from the 2" wide shoe to the 2.75" wide shoe size .
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