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#1 |
Registered User
Join Date: Feb 2014
Location: Irvine CA
Posts: 1
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Another engine swap question 400-305-454
I have a 72 C20 Cheyenne. Came with a BB 400 from factory and somewhere along the line some one installed an early 80s caburated 305. Some one is offering me for free a 3/4 ton 1982 silverado with a TBI 454 and 4 speed transmission. Truck hadn't been started in 10 years.
I am thinking about taking the truck and canabalizing the engine and transmission plus maybe A C parts for my truck. Any thoughts on if the engine and transmission will bolt in? Any one have any thoughts about this engine? I'm considering just trying to sell the 8 2 and use the money to buy engine and transmission for 72 but I would save a bunch of money if I can swap engines out. Thanks |
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#2 |
Senior Member
![]() Join Date: Mar 2012
Location: Chesapeake, Va
Posts: 1,275
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Re: Another engine swap question 400-305-454
i think the engine should bolt right in, as long as you stilll have the BBC engine stands,
if it has not been started in quite a long time , i would at least take a look at the bearings and replace all the gaskets while you have it out, no sense and putting it in just to have a head gasket blow or a nasty oil leak
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Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks ![]() |
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#3 |
Registered User
Join Date: Jan 2011
Location: Chattanooga, TN
Posts: 2,149
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Re: Another engine swap question 400-305-454
If it is an '82 it should come out mounts and all and bolt in. But an '82 is not a TBI 454, that didn't start until '87 I believe. Is it a '92 maybe? If so, the motor will work but the mounts may not. They did make suburbans and 1-tons in square body style until '91. Is the 4-speed a manual or is a 700R4 automatic?
The TBI 454 is not a real power house but is still pretty thirsty. The heads are not all that great for performance. I think you are much better off with a nice 350 or 383 myself. Even better, do an LS conversion. Need more details on your donor truck.
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'83 K20-TPI '73 C10 '79 C10-ex-diesel(SOLD) '07 Tahoe(Son driving) '14 Suburban-DD '71 C10-current project |
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engine swap 454, tranny swap |
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