I have a 87 Iroc with factory heads, headers flowmaster exhaust, ported plenium, modified MAF sensor, K&N air filters, bottom cut out of air box, adj. fuel pressure regulator, 8.5mm spark plug wires...what will 1.6 roller rockers do for me horsepower wise???will these max out my valve springs???how do you decide if they will work or not, i understand you need to measure your springs...what measurements determine if they will work???

 

i also have a air foil...not that it is that important....

 

You will probably get more responses if you ask this question in the 3rd Gen Engine Tech forum.

Sorry, I can't answer your question.

Dan