351w Aluminum Block

[bkniep]

If I am looking for 400 bhp and good driveability along with minimal weight, are there any disadvantgaes to an aluminum block. Reliability? I am not looking for max power, but rather a reliable and streetable engine in a very light weight pkg.
Bill

[blykins]

The extra cost to me isn't worth the 90-100 lbs.....If you're not racing, you'll never know which block is under the hood.....You're probably gonna pay around $3500 at least for an aluminum block.

[Mike Simard]

The aluminum blocks are better than a stock block aside from the weight. They have 4 bolt mains, blind tapped head bolt holes, taller lifter bores for roller lifters and larger bore capability. If you can afford it, it's a very good thing to have.
Yes, you will feel the 90 lbs missing. The steering will be lighter and your car will turn in better.

[750hp]

... and now that David Kee is producing his alloy toploaders, there's another 40lb weight saving !