andy-lswon

iTrader: (1)

Are the TSP/PRC heads available to buy with a 4 bolt pattern? If not will the 6 bolt pattern bolt on to a stock LS3 block?

G Atsma

The 6 bolt pattern will work. The extra holes aren't used.

andy-lswon

iTrader: (1)

Awesome. I wasn't sure what would need to be done for the extra holes or if any mods would need to be done. I'm leaning towards these bc of price. If I reused my Btr springs I already have I could have a decently cheap set of aftermarket heads

andy-lswon

iTrader: (1)

also looking for a set of 1.7 roller rockers that would work with these heads

G Atsma

You mean roller tip? Technically, the OEM rockers are roller trunnion, though they can fall apart, and the recommendation is to do a trunnion bushing upgrade.
If you do mean roller tip, TSP has some new steel roller tip rockers that are 1.7, which is the OEM ratio. Comp Cams has some too.
Talk with TSP about what they recommend. They do have theirs of course but sell others too.

andy-lswon

iTrader: (1)

I was looking at either the tsp ones with the Che bushing upgrade or the yells terra ones but have heard of failures with those and can't find alot of info on anyone that have used the tsp ones

G Atsma

The TSP rockers are very new, but appear to be a good design with OEM-style body(good...) roller tip (VERY good....) and the CHE bushing option (REALLY good!). I would be tempted to go that way.

andy-lswon

iTrader: (1)

That's the direction I'm leaning towards bc of everything you mentioned. I'm having a hard time deciding between the PRC or trickflow heads to install them in

KW Baraka

iTrader: (7)

Only stock (OEM) rockers or TSP's 1.72 roller rockers will work with the PRC heads......unless you pay several hundreds of dollars to get the heads modified to accept other rockers.

Ask me how I know........

I would recommend calling TSP.....just don't do it between 12:00 and 1:00 pm Central time.....that's their lunch break.

KW

andy-lswon

iTrader: (1)

I'm still trying to decide between the PRC heads or trickflows. Trying to get as much info on either as I can. I have 2 threads posted one for each lol

andy-lswon

iTrader: (1)

do the prcs have bronze or powdered metal guides

G Atsma

Checked the website but nothing mentioned about valve guides. You might give them a call tomorrow.