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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: Spool on October 13, 2019, 08:38:23 pm

Title: Bore out 350 or Swap 454
Post by: Spool on October 13, 2019, 08:38:23 pm

73' C20

Getting way ahead of myself... As my truck has sat for three months with a knocking noise.

But, if I need to pull the engine, worst case, for cylinder work...
Is now the time to hone larger or swap for a 454 crate block?

Thoughts?
Prices?
Experiences?

Title: Re: Bore out 350 or Swap 454
Post by: FlatBlack77 on October 14, 2019, 09:30:17 am

What transmission do you have?
What is your budget and power goals?
You cant swap 350sbc parts onto a 454bbc block. You would need to buy everything else to complete the 454. You would literally have to build the entire engine from the block.

Title: Re: Bore out 350 or Swap 454
Post by: JohnnyPopper on October 14, 2019, 12:56:50 pm

Do you know how many miles are on the 350?

If miles are reasonably low, you might have a stuck lifter. I've heard some that sounded like bad rod bearings. Try some Rislone.

You won't know much until you tear down the motor and take measurements.

If you find a running 454 in good shape you will have the hardware/accessories required to do the swap.