843's v.s. 241's
 

Crap I have 853 heads...is this bad compared to the 241's....if I plan to go with a tr224 or tsp228 cam would the fact that I have 853's hurt the performance....would you put springs in a 853 or spend the money to polish them or should I just buy LS6 heads or better? I have a funny feeling I am going to spend more money than I thought...but I have that horsepower bug bitting me and I want to do it right the first time...car only has 40k miles

Are you sure you didn't mean 853 head castings ?

806 97-98 aluminum perimeter bolt 5.7
853 99-00 aluminum center bolt 5.7
241 01-03 aluminum center bolt 5.7 (some late MY00 cars got 241 castings)


241 cast heads were Die Cast which is a process that smooths up the ports a bit compared to the Sand Cast procedure that was done on the 806 and 853 heads. Once ported any "advantage" the 241 cast had is moot.

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the 853 is the same as the 241 just a differnent cast! the most you will probly gain going from 853 to 241 heads is about 8RWHP which is not much and not worth the time to get new heads!