I have a 2004 CCSB Z-71 that came with a LM7 5.3L engine. The LM7/4L60E has 22,000 original miles. The truck has 3.73 gears and a G80.

So far the modifications are,

Black Bear Autocal 91 oct tune, Magnaflow muffler 3" SI/SO 14" long case, Airaid M.I.T., OEM airbox with the bottom partially cut out open air modification to the bottom of the airbox

These are parts that I have on hand,

#799 heads, Dynatech 1 3/4" long tube headers, Corvette servo

These are the parts that I’m thinking of going with,

Dynatech Hi-Flow catted Y pipe, 220 cam, converter in the 3,000 – 3,200 range

What kind of numbers would this combo be capable of?

What would this combo push my truck to in the 1/4?

 

I would imagine that would put you somewhere in the mid 13s. But im not very good at estimating that stuff.

 

Thanks man I appreciate your input. I would cut a back flip if it ran a 13.999!