Freak

Why build a 427 instead of a 454 or bigger or a 327 instead of a 350 or 383? maybe because that motor happens to hold a special place in the heart of the builder. It absolutely amazes me that people seem to assume that their way of thinking is the only way. Not everyone cares about power above all else. Building your dream car can be as much emotional as logical (for some of us it may be almost totaly emotional), and sometimes that means choosing to go in a direction that most others wouldnt, and you might not if you were building a race car.

I say go ahead and build yourself a nice 427 if you want. World Products and Dart both produce excelent blocks for both big and small Chevys, and if, in time, you decide you want to up the size they can be safely bored over much larger than the stock blocks.

Stephen 87 IROC

Trouble with a 427 or even a 434 SBC is heads. The larger the engine, the more it needs to breath. I'm not saying you can't feed that 427 SBC but the cost of big heads to feed the engine can buy a bunch of factory BBC heads that start at those kind of flow rates, unported. 049 and 781 BBC heads are the best factory oval port heads. Put in some 2.19/1.88 valves and do some minor port and polishing and they'll perform on just about every BBC. I ran some 781 heads for a couple of years then picked up some Merlin's. This winter I now have some Canfield aluminum heads on the engine.

Cubic inches doesn't make HP. It just moves the curve ahead. Mine now peaks at 7500 rpm.

stale

Small block 427's aren't even an option for me, I have a prefectly good (well after rebuild) 327, so I'd just throw that back in the car. I really have some sort of attraction to the *27 motors for some reason, I don't know why. Looks like I can get a newly cast GM 427/454 block for not too much. Now the difference between a 427 and a 454 is a 3.76" stroke vs. 4" right? Doesn't that mean I'd have to deck the block down a little if it's originally cast for a 454 or do I just throw in a 396 crank and some tall pistons?

jg95z28

If you're looking for a BB 427, I'd try the fellas over at http://www.yenko.net.

If anyone has one, knows where to find one, or how to build one, they would know.

As to why build a 427? Again... http://www.yenko.net

IMO, a 427 is more historically accurate for a 67-69 Camaro than a 454. And no, they aren't the same.

stale

You're a good man, thanks! I think a 427 would rock in my '67 personally. 454's belong in 80's Monte Carlos and box Novas

nin97

the new LS7 is a 427...put one of those in your first gen and you're laughin

mls48341

I have two 427 big blocks and have to say I love the way they run.
600 h.p. is possible using a factory short block.I actually have one
rect. port and one oval port motor.The 600 horse motor has less than
$5000. invested in it.So I guess the main reason to build one could be
having parts lying around if you're an old timer like me.