Hi, i want to know if i can install a set of roller rockers on my stock 305 with l03 heads wich have the factory rockers wich arent rollers. Will 1.6 ratio not work, im kinda loss, dont know wich to buy and were, can any of u guys tell me if i can just install a set of roller rockers on my stock engine without having to modify anything else.

 

Narrow body full roller rockers will fit with centerbolt valve covers, you may need to mesure if the pushroad lengt needs to be changed.

 

Thxs, but will i need to modify anything to install 1.6 rockers ? Since they increase valve lift and stock swirl ports i have heard have small valve lift capacity.

 

The stock LO3 heads allow up to .470 in lift, safe. The LO3 cam with 1.6 rockers is in the .400 lift area.
I suggest you read the sticky treads, the search function is wery helpful too.

 

Where is the sticky pertaining to the 1.6 rollers...i can not find it...Thank you, Tom

 

https://www.thirdgen.org/forums/tbi/...-synopsis.html

I posted cam specs with and without 1.6 rockers. I am personally running 1.6 Comp cam roller rockers on my car with no issues.

 

Thanks....I seem to have pushrod clearance problems where the pushrods go thru the holes in the head...Is this common on these motors??? Looks like I may have to grind a little bit on each hole...Tom