hey well down at the shop i ran into a 454 vortec im new to this motor i pulled outta wrecked dually and tore that sucker downto the block i bored it .060 over new flat top forged pistons by seal pro new crower cam intake duration 278 and lift 541 exhaust 286 lift 563 nitrous friendly balanced the crank did a stage 2 porting on the stock heads with a 3 angle cut on the valves and planning to spray 325 shot of nitrous in a two stage i wanna put it in a four dour 98 silverado i had my eye on on hit like 12s 11s on motor and really hoping for those 10s with the spray o and for everthing else i gotta 4l80 beefed up an 456 rear end ratio sound possible guys lemme no if not what would sound possible o also im gonna tune it

 

Space bar and comma and period, Left to right words form sentences, sentences form paragraphs.

 

wow this guy was some help

 

It was good advice!

 

I agree! It's hard to understand a post when it's lacking any fundamental grammar structure. Yikes!

The build sounds pretty impressive to say the least. I think that traction may be a bit of an issue with all of that torque. I had a '98 and really liked the truck. It had a really solid feel to it that the NBS trucks seem to lack. Good luck and let us know how it works out.

 

325 shot of nitrous

 

good luck. Those heads are pretty crappy stock. I switched to some ported Edelbrocks and picked up a ton of power.

 

i heard these heads with minor porting are great but we'll see and well im running radials on it with some traction bars i still gotta install tho

 

L29 heads have small oval ports. Compare the ports to the gasket and you'll see how much smaller the intake ports are than a "standard" BBC oval port. The main problem with them is the combustion chamber. L29 heads have a very pronounced ridge in them making the "heart-shape" synonymous with the original Vortec fast-burn concept intended to reduce emissions. I've found the combustion chamber design to limit the amount of timing advance you can give it before it stats pinging.
A better option is a pair of Brodix Race-Rite oval port aluminum heads. These have intake ports that exactly match the gasket, will requiring porting the stock intake manifold to match, and they have more conventional performance-oriented combustion chambers. The Brodix are one of the few that have exhaust ports in the stock location retaining compatibility with your existing exhaust components.
In my opinion it will be too difficult to reach your goals with the stock iron heads with their small ports, ping-prone chambers, and weak springs.

 

thanks alot james b but with the heads you think my goals sounds possible oh and wut you runnin in the tahoe if you've ran it o and i got the springs to go with the cam sorry forgot to mention that