Rear Leaf Spring Help Needed

[scuncio]

One more thing: if the fore-aft location of the rear wheels is different from side to side, these lowering blocks allow you to dial it in perfectly: http://www.speedwaymotors.com/xq/asp...qx/Product.htm

The circle track guys have some trick parts!

[mudjnky]

Thanks for the tips, I definitely have to replace the perches. They are welded inboard too far, someone did a hack job at some point. Even the welds are bad on them.

[WILMASBOYL78]

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When my engine guy calculated everything it is supposed to make 450hp, you are right, 425hp out of the crate, sorry about that.

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I know this is a hijack but the crate motor stuff is interesting. GM claims 425hp with 163 intake and single 4bbl with headers...you have a dual quad setup..haven't seen a cross ram setup like that in a long time....I didn't think the motor really had too much with the big rect port heads and low compression: 8.75 to 1(advertised)..we put the 502/502 cam in and switched to alum heads(shaved slightly)..I still don't think it is all it could be, but it is fine for the street scene.

wilma

[mudjnky]

We're going to put in a bigger cam over the winter. I hope that will wake it up some. One more show in a few weeks then it all comes apart.

[WILMASBOYL78]

There was a great article a few years back in one of the magazines(Super Chevy or maybe Chevy Hi-Performance) called the "Frankenrat". It was all about this motor and some upgrades they did. The combustion chambers on those rect port heads are the size of the Grand Canyon..if you can get the compression up to about 10.5 to 1 and add some cam..you will make a lot of power. We also used the Edelbrock Airgap RPM manifold. We didn't change pistons..just milled the aluminum heads(oval port)..that limits cam timing because of valve clearance issues. If I did it again I wold just use the bare 4 bolt block and build from there. I will try to find that aticle and post it for you.

wilma

[mudjnky]

Thanks!