KBOBOZ71

iTrader: (36)

i am fixing to have my heads worked on, by getting a 5 angle valve job, mild porting and polishing, and shaving them about .030. my question is will i have any fitment issues with the intake after having the heads shaved. and what type of head gaskets and intake gasket should i look into. any help is appreciated.

TurboGibbs

iTrader: (6)

flat surfacing of .030" won't effect intake fit at all. The stock mls head gaskets and stock intake gaskets work well. You can probably reuse your intake gaskets.

Richard@WCCH

iTrader: (3)

We've milled over .045" without fitment issues. You should be fine milling .030".

Richard

KBOBOZ71

iTrader: (36)

okay now knowing that, how much should i mill them. i will be racing quite a bit, and i will have flyer do the tuning to watch for knock after the raised compression. i am looking for the most out of it without sacrificing driveability and reliability. and is there anything else i should have done to them while i have him working on them.

twobit

iTrader: (12)

I went close to .050 and didnt have any problems. I needed shorter pushrods.

02sierraz71_5.3

iTrader: (2)

I took .050 off, you wont have any problems

KBOBOZ71

iTrader: (36)

thanks, do you think i would have to have shorter pushrods by going only .030 or maybe .040?

KBOBOZ71

iTrader: (36)

do you think it would be beneficial for my setup to go .050. or should i stay around .030 or .040. keep in mind im looking for the most power i can make without sacrificing realiability.

Flyer

iTrader: (1)

Something else worth mentioning is the TR220 cam. You could go .030 on the heads and go with a thinner Cometic gasket, that way if there were a problem, you would be able to go back to a thicker gasket and be safe.

02sierraz71_5.3

iTrader: (2)

Assuming you've got a 5.3 I could see going .060 with that 220 cam. I would check you p/v clearance after install, if you have issues you can always flycut they make tools for doing it with pistons still in the block. I think we can take alot of material off before issues with p/v as we have dished pistons, the ls1 guys run 12:1 routinely with flat tops and our 5.3 heads milled .050-stage 3 with huge valves
I dont see why we cant get away with a moderate cam like the tr220 and have compression in the same 12ish range. I really think cams like the tr220-224 and lpe gt2-5 love compression and no one has even touched the limits on this forum

So I say go .060 and show those boys in MS and LA whats up