I'm trying to find out more info about using a bigger cam (.480 to .500 lift) in the 305TBI motor. Has anyone been able to properly tune (through chip burning) a bigger cam to run good in our motors?...besides cutting the valve Guides, what else would have to be done (heads, ect.) to accomodate a cam with a bigger lift? (.480 - .500 range) Thanks for any tips and advice!

 

im running a zz4 cam, and my tune is great, took a while, but if you want to go larger than lt1 do it, just be prepared to put a lot of time into tuning it, and youll need to get different springs

 

thats good to hear...what did you have to do with the heads?...will porting and resurfacing be enough with the stock heads, or will i have to get different heads?