454 BBC education

February 16, 2019, 06:31 PM

Larry Woodfin

454 BBC education

I am out of the loop in ref to BBC.

My first desire is to find a nice, standard bore, four bolt, 454 block that will run standard with a.001 - .002 hone.

Beyond that, other than the original Mark IV design, what other BBC blocks will accept common BB parts

February 16, 2019, 07:33 PM

green1

Pretty sure until you get to Gen V and Gen VI everything interchanges and in the two I mention not sure of Gen V but Gen VI has one piece rear main seal so crank is different but you can buy adapter to two piece seal style crank in one piece style block. Also cam cover is different along with oil pan.

February 16, 2019, 07:57 PM

Tom396

Factory 454s are "externally" balanced. This means you have to use a harmonic balancer and flexplate/flywheel that is intended for them. 396s and 427s were internally balanced, so their balancers and flexplates are neutrally balanced. 454s CAN be internally balanced, but they didn't come straight from the factory that way. Take care. Tom Worthington

If it seems that bracket racing has gotten too expensive for you, maybe you are just doing it wrong.

February 17, 2019, 07:26 AM

Busted Knuckles

I have found 3 of the Gen 6 variety that all cleaned up with a torque plate hone at .005 over, found a few pistons on the interweb that fit. I've never seen a Mark IV that would do that, too much fuel wash down/wear on the bores.

An adapter is available to convert the crank seal to 2-piece

Organized people are just too lazy to look for their $h!t.

February 17, 2019, 04:19 PM

HS professor

quote:
I have found 3 of the Gen 6 variety that all cleaned up with a torque plate hone at .005 over, found a few pistons on the interweb that fit. I've never seen a Mark IV that would do that, too much fuel wash down/wear on the bores.

Mark IV stuff is getting old already lol. I've had good luck with propane run generator engines, usually painted blue. All the ones I've seen are 4 bolt,sonic test good and had minimal wear.

February 18, 2019, 03:08 AM

Larry Woodfin

Thanks to all for the notes. I have decided to buy a new Dart block.

February 18, 2019, 07:56 AM

Curly1

quote:
Originally posted by Larry Woodfin:
Thanks to all for the notes. I have decided to buy a new Dart block.

Good choice. That gives you a better block with more options later.

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February 18, 2019, 02:41 PM

Goob

Gen V and Gen VI blocks are useless for racing engines....different oil pans, oil pump, weird bypass deal in the filter pad, timing covers, and some other stuff I don't remember......Oh yeah, no provision for a block mount fuel pump.

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February 19, 2019, 10:31 AM

Busted Knuckles

Priority main oiling can be a big benefit.

And a few have fuel pump provision, only the crate engines/blocks, though.