roller rockers, car falls on its face HELP

[foxbody88stang]

i have an 88 stang converted to maf put 1.7 rollers on about 5000 rpm s it sputters not sure if its running out of fuel or valve springs r worn any suggestions let me know thanks

 

[tmoss]

If you did not put fresh springs on it, I'd start there.

 

[jgfiveoh]

agree. 1.7 rockers @5000 rpm on old stock springs equals poop. freshen em up