ok so i bought a 91 z28, the guy said it has a 350 5.7 of a 89 iroc-z, but im not sure i toke it to the track an i hit a 14.9 but that dosent tell me much cause i havent done oil change, an i dont know how good the sparks, an wires how can i find out what it is, cause i want to buy some performance stuff, please help.

 

Welcome aboard.

Check the casting number on the back of the block, then take that number to http://www.mortec.com/castnum.htm and look it up. Will tell you pretty quick what it is. As for performance stuff, though, when it comes to getting bolted to the outside (like heads, headers, intake, etc), most stuff doesn't care if it's a 305 or 350. Bolt patters are the same.

 

thanks man, im going to do that first thing tomorrow.i hope its a 5.7. p/s do u know if the
airfoil works.

 

On a stock motor, not worth it.

 

well it has headers, 3.73, shift kit, an some new drag radials, what can i put to give it some good power.