454 swap ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

colohusker · 07-19-2002, 01:51 AM

I have a chance to get a 454 block for $75, don't know what is all there, whether it has cam, crank, heads, or what shape it's in. What's a decent 454 block worth if it doesn't have heads, etc?

If it's fairly complete and I get it, what all needs to change to swap it in place of my 350? I think I need BB towers, new brackets for alt, ps, and AC. Does a TH350 bolt up to a 454, assuming it's not a BOP block, or would I have to switch to a TH400 or something else? Would the stock 1/2 ton springs in the front be able to handle it, or do I need to swap to HD or 3/4 ton?

And lastly, if given this chance, how many would do the swap?

Scott

Scott70Chevy · 07-19-2002, 01:56 AM

I don't know all the details to do it, but I'd love to have a good BB (as long as it wasn't a daily commuter vehicle!). From what I understand, performance parts will cost you a lot more with a BB. Of course, with the extra cubes you may not need as many performance goodies as on a small block!

Super Chevy · 07-19-2002, 01:59 AM

Trans will work, If that motor is mostly complete your getting a deal , 454's are spendy complete, springs will be fine,the truck will just sit alittle lower...

Longhorn Man · 07-19-2002, 07:15 AM

Sounds to me like you have all the bases covered.

Quote:

I think I need BB towers, new brackets for alt, ps, and AC. Does a TH350 bolt up to a 454, assuming it's not a BOP block, or would I have to switch to a TH400 or something else? Would the stock 1/2 ton springs in the front be able to handle it

No such thing as a BOP 454....they each got there own frame twisting 455.
You will want to keep an eye on the tranny tunnel as you do the swap, all big blocks had high hump cabs...

HvyChevy454 · 07-19-2002, 07:58 AM

it is a little tight under the hump but it will fit, i have a th350 behind my 454 and am still riding on SB springs. just get BB shocks cuz it will eventually blow out the SB ones

*Randy70C-10* · 07-19-2002, 08:05 AM

The bare block is worth more than that as long as there are no cracks and the cylinders are in good condition or can at least be bored. If there are pistons in the block, check to see of they have .030 or ??? stamped on the top, if not, make sure you have the bore checked. $75 is awful cheap, do you know the guy?

imdarren · 07-19-2002, 12:37 PM

So are you guys saying you can't run a big block in a truck with a short hump in the cab? Or are you saying you can't run a TH400? I need to know this. I have a 67 C10 with a short hump in the cab, and I would like to intall a 454 with a TH400. If needed, I could have a tough TH350 built if thats all that will fit.
Help me out here guys! I cant afford ot buy a 454 /Th400 and then find out later it won't fit.
Darren

Livrat · 07-19-2002, 02:22 PM

If you can get a good block even if the rest is gone for $75 buy it.to do the swap correctly you should use BB towers,brackets,pulleys,shrowd,possibly a bigger radiator.454 cores in AZ are $750 up in machine shops,if you need any big block parts i prety much have it all,i believe.fastest way to get ahold of me.im using fathers screen name,but this is Desert Rat

72burb 4x4 · 07-19-2002, 06:29 PM

A th400 will fit in a low hump truck

07-19-2002, 01:51 AM	#1
colohusker Registered User Join Date: Apr 2002 Location: Longmont, CO Posts: 436	454 swap ? I have a chance to get a 454 block for $75, don't know what is all there, whether it has cam, crank, heads, or what shape it's in. What's a decent 454 block worth if it doesn't have heads, etc? If it's fairly complete and I get it, what all needs to change to swap it in place of my 350? I think I need BB towers, new brackets for alt, ps, and AC. Does a TH350 bolt up to a 454, assuming it's not a BOP block, or would I have to switch to a TH400 or something else? Would the stock 1/2 ton springs in the front be able to handle it, or do I need to swap to HD or 3/4 ton? And lastly, if given this chance, how many would do the swap? Scott __________________ ------------------------------------------------ I say it's only money, my wife says it's only a truck.... '71 C10 Deluxe, factory ac, ps, pb, should be done by 2102 Longmont, CO husker95@hotmail.com

07-19-2002, 01:56 AM	#2
Scott70Chevy Registered User Join Date: Jan 2001 Location: Waxahachie, TX, USA Posts: 114	I don't know all the details to do it, but I'd love to have a good BB (as long as it wasn't a daily commuter vehicle!). From what I understand, performance parts will cost you a lot more with a BB. Of course, with the extra cubes you may not need as many performance goodies as on a small block! __________________ Scott70Chevy '70 CST: LWB, Fleetside, black ext., black/gray int., 350-4bbl, 3-speed, 12 bolt 3.07, deep dish rallye wheels, NO RUST!

07-19-2002, 07:58 AM	#5
HvyChevy454 Slowly getting CRSS... Join Date: Jul 2001 Location: Lutz, Florida Posts: 656	it is a little tight under the hump but it will fit, i have a th350 behind my 454 and am still riding on SB springs. just get BB shocks cuz it will eventually blow out the SB ones __________________ -Nic Lutz, Fl My Team Website The Heavy Chevy Website ------------------ 72 Cheyenne 10 LWB GM 12-bolt 3.08 w/ Auburn Posi 91 454 Edel Performer RPM Intake 750 cfm carb Comp Cam 268/.495 Hedman Headers Dual 3'' Exhaust 71 Cheyenne 20 4x4 Fact. A/C PS PB Tilt Currently in the works... Speak Softly and Carry A Big Block... There is No replacement for Displacement... "If everything seems under control, you're just not going fast enough." - Mario Andretti

07-19-2002, 12:37 PM	#7
imdarren Registered User Join Date: Oct 2001 Location: SW Washington Posts: 1,006	So are you guys saying you can't run a big block in a truck with a short hump in the cab? Or are you saying you can't run a TH400? I need to know this. I have a 67 C10 with a short hump in the cab, and I would like to intall a 454 with a TH400. If needed, I could have a tough TH350 built if thats all that will fit. Help me out here guys! I cant afford ot buy a 454 /Th400 and then find out later it won't fit. Darren __________________ Washington State 1967 Chevy C10 LWB Rodstoration In Progress. 1972 K20 Cheyenne Super

07-19-2002, 01:59 AM	#3
Super Chevy Registered User Join Date: Feb 2001 Location: Ohio Posts: 1,025	Trans will work, If that motor is mostly complete your getting a deal , 454's are spendy complete, springs will be fine,the truck will just sit alittle lower...

07-19-2002, 08:05 AM	#6
Randy70C-10 Account Suspended Join Date: Mar 2001 Location: Virginia Beach, Va. U.S.A. Posts: 15,320	The bare block is worth more than that as long as there are no cracks and the cylinders are in good condition or can at least be bored. If there are pistons in the block, check to see of they have .030 or ??? stamped on the top, if not, make sure you have the bore checked. $75 is awful cheap, do you know the guy?

07-19-2002, 02:22 PM	#8
Livrat Member #1049 Join Date: Jun 2000 Location: Troy Montana Posts: 3,940	If you can get a good block even if the rest is gone for $75 buy it.to do the swap correctly you should use BB towers,brackets,pulleys,shrowd,possibly a bigger radiator.454 cores in AZ are $750 up in machine shops,if you need any big block parts i prety much have it all,i believe.fastest way to get ahold of me.im using fathers screen name,but this is Desert Rat

07-19-2002, 06:29 PM	#9
72burb 4x4 Registered User Join Date: Jun 2002 Location: texas Posts: 31	A th400 will fit in a low hump truck



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