Thanks for answering my questions. I didn't know that GM offers other, less expensive blocks that can be used to build something like a 427 small block.

 

I don't think so, either. Your best bet is Motown.

 

They absolutely DO. I have a Genuine Chevrolet Bow Tie block wrapped around a 427. They are available in both 350 (2.45") and 400 (2.65") main bearing sizes. I think you have a choice of two different bores and 1 or 2 piece rear main seals.

RACE ON!!!

 

There are a lot of high quality non-OEM blocks out there for buildups. The Rocket block is one, World Products, Dart, etc as everyone has said are good alternatives. The rocket block would be better if you plan on super/turbo charging the 427 or running a lot of nitrous, otherwise it's overkill.

On the heads/cam/intake, there are a lot of things to consider. #1 - stay away from the TPI intake system and the small cam like the plague. #2 - with the big stroke and big cubes of the 427 you won't need to try to get low end torque, it's just going to be there. What you have to decide is how wild you want to make it. Choose a power band you're looking for (you mentioned not revving it over 5k, which is low, even for a street motor, but definitely do-able).

Once you choose the RPM range and bore/stroke configuration, your cam's duration will be pretty well set. The valve lift is going to depend on a few things. First, what do your heads flow, and where do they do it? Some heads will flow a certain amount, and then as lift increases, they will actually "back up" and lose flow with more valve lift. Lifting your valves to that point makes no sense, and costs power. Other things to remember about lift: the more you lift your valves, the harder your making the valvetrain work. If you're looking for a 100k mile motor, don't go crazy on the lift.

If you're interested in some more input, let me know. I run a business now doing stuff like this, and can help you out on parts too.

maverickmotorsport@hotmail.com

 

Rocket blocks are tall-deck and move everything upwards, not necessarily the best thing on a vehicle with limited underhood clearance...
-Jeb

 

Due to the size differences of a lot of ordinary parts (pan rails, timing chain, raised deck =intake manifold issues), all the specialized race parts will add a lot of cost to what sounds like primarily a street motor with no benefit to performance or durability. The other alternative blocks for a 427 suggested will work fine, make the same power and cost way less.

 

Jeb,
Rocket blocks come in standard deck height, that's the only config they come in now.

It's what we got for my 427 SBC motor....for most people it is overkill, but I wanted a dependable block that I could punch out later and get 4 or 5 rebuilds out of without needing to invest in a new block.

We are also building it to supercharge for the strip...just for fun.