I'm putting some ported 243 heads/ls6 springs and a cam on my 04 2500 soon.

I'm assuming stock length push rods will work since the heads won't milled or anything. Maybe someone knows

Also I'm hoping stock 02 fbody 28 lb/hr injectors will be large enough. I want to upgrade the stock 24.5 lb ones.

I'll be using this cam

http://www.lunatipower.com/Product.aspx?id=2023&gid=288

Any input would be great. My heads got a mild port/valve job. I haven't gotten the full flow numbers, just heard they flowed
294 @ .575 intake
233 @ .575 exhaust

 

LS6 springs are too weak to handle that cam grind.

 

go with PAC , proven springs.

 

The LS6 springs would be marginal, I would not want to rev above about 6k rpm. Even 28# injectors might be borderline. Have your tuner log the injector duty cycle, you really don't want to go much over 80%.