stale

I know they've been discontinued forever, but is somebody still casting 427 blocks? I just love that motor and I'd love to build one, but it seems like it's pretty impossible to find a bottom end.

BIGBADBOWTIE

427 and 454 have the same bore....4.250

427 is made up of

396/427(3.76 stroke)crank
6.135" rod(BBC from 396 to 454 used them)
454 - 4.250 bore block
a set of 427 pistons

happy building.

Stephen 87 IROC

Of course the question has to be why build a 427 when it costs the same to build a 454? Same goes for SBC. Why would someone build a 327 just to say they have a 327 when it costs the same to build a 350?

Nothing special about having a shorter stroke 427 than a 454. I spin my 454 to 7000+ rpm but then I also have no stock internal parts so saying it can go to a higher rpm isn't good enough. The only reason to "have" to build a 396, 402, 427 BBC would be if you're building a restored car that came with that engine or you race in a class that requires the smaller engine. If someone happens to give you an original 427 then it's rebuildable as a 427 but you shouldn't be going around looking for 427 parts just to build one.

Try building/finding/buying an original 1969 aluminum 427.

MaxHarvard

The small block 427 is where i'd go for the 427 over the 454

BIGBADBOWTIE

427.... nah might as well build the Shafiroff ultrastreet 472..

stale

You guys are probably right, but it's the same concept as building a brand new Harley Panhead motor. A 427 is just one of those motors I'm fascinated with, but piecing together one isn't quite the same as having an old one. Maybe I'll just put together a 454.

BIGBADBOWTIE

I did not mean to put a damper on your plans. I have no doubt that you can find a good steel crank,rods,pistons on ebay cheap.

Just locate a suitable block and go with it.


PS There is a factory 427 steel crank on ebay for 200 bucks. standard/standard/never cut. Also a set of 049 O ports. Would make a GREAT start.

Don't let us change your mind. I know what you mean about a panhead harley. It just has a COOL factor like nothing else!!

Ray

CamaroTD

i may be wrong or you can do it eaither way but i thought a 427 was a 4 inch stroke with a 4.125 bore.

stale

Well if I can get the parts for a 427 reasonably I might still build one, but who am I kidding, a 454 is still very bad ***. I really just have a desire for some big block torque, I'm over the small blocks I think.

XcYZ

Ray lives! Where ya been?

angel71rs

That's aftermarket small block 427 dimensions.

sharpe

I think that's what he meant. It's a ZL1, isn't it?

By the way, people are making 427's out of LS1s. Now that's cool. They are using a Darton sleeve kit and resleeving the block to accept a 4+ inch bore. It's super expensive, though.

I just tried to find the page to link to from Darton's site, but that thing is so damn hard to figure out.

81Z28355

Well if you think telling people you have a 427 under the hood is impressive look into building a 540 or if you have some real money to play with build a 632ci. and watch peoples eyes bug out when the here that number. You can also take a 454 out to a 496 if you want to stick with a factory block.

Take a look at the GM ZZ454 with the aluminum heads, its really the best big block deal out there. GM claims 440hp but most dyno with a good intake around 500 with 500ftlb all for under 6,000 grand. Scoggin and Dickey seems to have the best deal on that engine. and hey you can always add a 427 sticker on the air cleaner, who is going to know.

BIGBADBOWTIE

SCOTT!!!.... yeah Im still alive. Ill send you an email......

five7kid

Some reasons/ways to end up with a 427 BBC:

#1: I have a '66 396 that is the same casting as the 427 that year. At the next rebuild, it just happens to get punched out to 4.250" bore and of course, that means stock bore 427 pistons - readily available.

#2: I have a 396 or 402 block that's clean at 4.125". The crank is wiped out. I just happen to have a 454 crank sitting around. Hmmm, custom pistons - is the difference in the cost of those pistons more than what I'd need to pay for a bare 454 block? Don't know, would have to investigate.

#3: I have a bare 454 block sitting around, and a 396/402/427 rotating assembly. When rebuilt, it gets the appropriate oversize 427 pistons.

At least one of those cases would cost less than going out and getting a 454 core and rebuilding it.