KLUG'S SS

iTrader: (6)

As mentioned already your compression ratio is now at the very least right at 12:1 assuming the combustion chambers are now right at 58 cc which you had said.

Just a tad bit high for an everyday street machine IMO.

youngbuck

iTrader: (12)

Is there anyway to lower the compression without swapping the heads? What is a safe compression for a dd ? Should I be ok with a 12:1 with a good tune an lower temp thermostat?

Rhino79

iTrader: (7)

I've seen f bodies run that cr on a good tune, but they are lighter. I'd say 11.5 would be a nice Target. Look at different head gaskets and figure our static and dcr.

grey matter 04

iTrader: (9)

running a thick head gasket will lower compression some

youngbuck

iTrader: (12)

How thick of one would I need to get into the 11:5 range?

AndysC3

iTrader: (14)

what gaskets do you have on there now?

youngbuck

iTrader: (12)

Just stock replacement.

AndysC3

iTrader: (14)

the stock replacements are .051" compressed thickness. You could get some of these in a .060 to take your compression to about 11.7:1 or .065 which will be about 11.5:1
Cometic Gasket - C5751 - Cometic Head Gasket 4.060" Bore - Speed Engineering Performance Parts

youngbuck

iTrader: (12)

Tht would get me in the sweet spot right?

AndysC3

iTrader: (14)

Have you been driving the truck around? I would do some lite driving and see how it does. But you would really benefit from some more free flowing heads.