pillarpod

I was planning on buying these Trick Flow Specialtie heads, and was going to run it with a CC503 with 1.6 rollers. I was wondering if i have to switch out the valve spring that will come with it? http://store.summitracing.com/partde...0&autoview=sku

gregrob

iTrader: (8)

I wouldnt bolt those on an lt1 wout having them milled. That 62cc chamber will castrate your compression

kinglt-1

iTrader: (26)

Agreed! although those would be good heads for forced induction...

pillarpod

go bigger on the chamber or smaller?

kinglt-1

iTrader: (26)

smaller! I think 58cc is stock and most mill them down to 52-54cc can't remember to get the compression in the 11's. This is based off of stock pistons as well. Changing piston's can alter compression also, depending on what you get. as well as head gasket thickness...

irocurpony8489

iTrader: (2)

stock is 54cc i would just wait and get the new trickflow 185cc head comes with 54cc combustion chambers and a 21 degree valve angle design