iceman99

I met a guy and he says he has some 317 casting # heads that came off and escalade? I am basically wanting them to drop my compression ratio on my 99 T/A with the tti street 76 mm. Im just confused on whether all you need is that 317 casting number and that means you are getting the 71 cc chamber for the compression drop/ Will these work or where do I get the ones that will? If so do the springs and everything work well on this kind of setup or am i forced to upgrade them?

Josh@KY-Turbo

iTrader: (120)

Yes the 317 6.0L heads have 71cc chambers. They will drop your compression ratio. As for changing the springs it is up to you. I would run a set of 918 springs at least. Just my opinion. The heads are a direct bolt on also. Hope that little bit of info helps.

iceman99

are the 918 so the valve seals up against the head better? Then am I going to need to upgrade the timing chain cause of the extra pressure of the springs?

iceman99

Thanks by the way. Im just trying to straight on this stuff before I jump into it. Ls1's are new for me. I come from a 350z and while that car handled better it definitely doesnt have the kick of a turbocharged v8.

SSilverSSurfer

iTrader: (8)

i wish i could find some 317's....frown

iceman99

what should i pay for them

98turbls1

iTrader: (17)

While most people accept money there are a few people that will accept unborn children.. =)

JK...Depending upon how good they look the average price (without springs) is somewhere between $300-$400...

98turbls1

iTrader: (17)

Also make sure that they are aluminum heads and not steel because the steel is more proned to detonation than aluminum...Just an FYI

99Z28LS1

iTrader: (4)

+1, some guy around here was selling his with a 5 angle valve job for $250, but i got bills

deadmanTA

iTrader: (7)

Paid 350 shipped for mine w/ only 10 miles on them. You are going to have to run the 6.0 head gaskets w/ the 317s I just found this out and need to sell my 5.7 gaskets now.

deadmanTA

iTrader: (7)

www.ls1tech.com/forums/showthread.php?t=655368

Towards the bottom of the post he has a set for 250 and theres another one a in the sale section for 200 shipped!

383ls1blazer

iTrader: (8)

got mine with dual springs, titanium retainers chromoly pr's and valves for 475 shipped from the classifieds

Chewy72SS

I got a set from eBay for $370.00 shipped. Complete with springs and valves.

Here is a used set up for auction right now.
317 6.0l Heads $300

SSilverSSurfer

iTrader: (8)

take that back guess im not looking in the right places

deadmanTA

iTrader: (7)

Thats just the old law of not being able to find it when you want and the only thing you can find when you don't want it. Took me 6 months to find a set. Now thats all I see and can't find the stuff I want to buy now.

cablebandit

iTrader: (37)

I got some stock 317 that i may put my 921 springs on and sell.

Smearin

Got my stuff off ebay.. I paid $600 for a 6.0 iron block, crank, and heads..

But sold all that later on

6techniques

iTrader: (7)

Ill actually be looking for a set of heads in about a month or so and I found a few in the $250-$350 range, so they can be found for decent prices.

SSilverSSurfer

iTrader: (8)

lmk jerry

bumpin_records

iTrader: (19)

i have a set i will sell if anyone is interested. I decided to go with darts. I paid like 380 shipped now i dont need em lol