RNation0001

iTrader: (2)

would it be ok to run a 243 on one side and a 799 on the other??

Black02SLPSS

iTrader: (5)

From what i have gathered they are the same head aside from the difference in casting number so you should be fine.

thunderstruck507

iTrader: (18)

can and should kinda depends...the 799 tend to be rougher so they might be a little off on flow

without having them both in hand it's hard to say whether I would or not

RNation0001

iTrader: (2)

well now I found a good deal on a set of 243's so if I can sell my 799 ill be good to go

01ssreda4

iTrader: (96)

Yes it would be fine.

02WS6SSZ71

iTrader: (20)

The 799s were slightly rougher cast, and I believe the 243s had sodium filled valves, while the 799 did not.

redbird555

iTrader: (14)

No not all 243's had sodium valves, only the ones that came on ls6 engines did. With that said I have held the 2 in my hand and couldnt see any difference in the smoothing of the casting. I have even heard of guys getting ls2's or truck motors that have a 799 on one side and 243 on the other so I wouldnt worry

RNation0001

iTrader: (2)

well i got lucky,, selling my 799 head for 120. and found a set of 243's for 300 bucks lol