Thread: Block id??

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Yes that would be best Could be a 302 or even a 408 From that Block . http://www.popularhotrodding.com/tec...ock/index.html

The numbers thing can be terribly misleading, most anything could have been done over the years to the block and other components.... Very easy to check the bore and stroke before you dissassemble it. If it's just a bare block, then just measure the bore and probably also check the dimensions on the cam and crank journals....Who knows what's been done there??? If it's dimensionally what you want, then have it tanked and mag checked. Then build it....

On a street type engine, I don't really think it makes a whole heck of a lot of difference what the nickel content is, street use won't stress it much anyway...

Another consideration before you waste a lot of time searching for a block, then having it cleaned and checked, then all the machine work remember there are a number of companies along with the OEM manufacturer that offer brand new blocks that are superior to the production pieces.... No sense to spend a bunch of time and money, reject 3 or 4 blocks cuz someone has already been in there and mangled a few parts or performed some questionable machine shop practices, then spen all the money for maching everything when a brand new block can be had for under $2k..... Ask Pat or one of the other machinists what it costs to do a block up so that dimensionally it is equal to a new one.......

It's not always about how much $$$$ you spend, but how you spend it.....

Like you said for a Street Build up to 450 H.P a GM Block is Fine . If you are Going over that or Running Lot's of Nitrous / Boost . Then Buy the Dart or World Block . As for other SB Chevys being Externally Balanced . Yes the 1986 and Newer One Piece Seal 5.0-5.7 Engines Use a Counterweighted Flywheel / Flex Plate . But it's weight is much smaller then the 400's .

To quote from the Dart site:

"Dart's new Special High Performance (SHP) small-block meets the need for an affordable, precision-machined cast-iron block with superior features. Designed for high-performance and heavy-duty applications producing up to 600 horsepower, the SHP block is the ideal starting point for hot rodders, drag racers, circle track competitors, off-roaders, and high-performance marine enthusiasts." unquote

This is a new block, Mains #2, 3, 4 are 4 bolt with splayed caps... Dart retails it for $1500, seen it other places for a bit less.........

Guess it depends on what you're planning on building, but this looks like a heck of a deal for me... Think chebbie sells one in their catalog for even a bit less???????

Sure that's a Nice Block You can Build a 454 SB with one of them Blocks . I would Love to have one . But Even at that Great Price I have to Pass on it But I do have a Few 10/20 High Nic Tin 3970010 Blocks with the stronger caps and a Few sets of heads Laying around ? A 355 420 H.P Build will have to do for Know . But if I ever win it Big I will build Two of The Dart Blocks They are Nice same as there Cylinder Heads are

Yeah I have found out now that it is a 400.
Thanks for all the help