Very disappointed with my 347 dyno!

[8850]

I took my 347 to MTI's dyno today. Needless to say I am very disappointed. Here are my results of rpm verses hp. No torque values were calculated as they told me the dyno doesn't read torque sometimes with slicks.
2900 rpm 295 hp
3400 305
3900 309
4350 322 Peak
4800 305
5300 300
5800 260
6000 220

Nothing but down hill after 4350.

My LS1 with stock cam, stock throttle body and intake makes more hp than this. I see why shifting at 5000 rpm gives me .3 better et than shifting at 6000.

I'm ordering a set of 1 3/4 headers tomorrow! Maybe my 1 5/8 shorties are the problem. This cam is suppose to pull to 6500. My Cobra intake has been killer ported.

My daily driver makes more hp than my trailer car...Boo!

Here are my mods:
88 347 n/a,ASP race underdrive,Pro-M 77 MAF w/30# injectors and ASP extra long air filter/adaptor,190 fuel pump,Ported Cobra U&L,CNC and ported Twisted wedge heads(9.9:1cr),Comp Cams 224/230 @ .050 w/.550 lift,stock block,Mac 1/5/8" shortie ported headers,2' straight pipe exhaust,ASP steel solid motor mounts,Hoosier slicks,Lakewood 90/10,Eibach drag springs,3.27 gear,C-4 with reverse manual valve body,#6 pump PI converter,Crane HI-6,2420# race weight