Cash is King, what's the budget?
you can spend the same $ on 2V's as you will the 4V's, all the same basic concepts just a little different geography that makes quite a difference. I doubt you'll get much of a discount at the machine shop because "they're just 2V's"
2V's will get you to your goal, even the D5xx smog castings (1975+) will make 400 hp if done right... but why?
besides budget, the next factor is time-frame
how soon do you need heads?
you'll find a screamin deal on running take-off heads if you're patient, it's the NOW that costs $
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