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Ive never heard of anyone saying "you'll be alright with the afm lifters" when discussing a cam swap.
Its not hard to do yourself, whether you do fixed or VVT, you should replace those lifters, so it makes the cost about the same, taking the heads off.
You'll kick yourself later if you do all that work/spend all that money for a mild increase in power.
I have the night fury(fixed cam) and went from 375/390 to 470/440 increase of 95hp and 50tq with a ported intake, U/D pulley, cam, ls3 conversion, stall, tune
Plus you'll miss the lope if you go too mild.
I haven't really heard of anyone using the AFM lifters with a cam, or installing the TSP AFM cam though
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