200 and 400 , i wish
actually the TA is closer over 300 and the BHJ is over 500 with shipping
these are buicks not chevys , much much smaller market
if you really want cheap to
take a risk on a forged crank setup you could have the stocker cut to a neutral balance (weber racing) but even that will run 225 plus what the stock balancer is worth (as a core) plus shipping
the TA is really just a hub like the stocker but it is stronger and sfi approved if you do track the car in the 10s
the BHJ is a true harmonic damper and is SFI approved , but be forewarned they do have a consistancy issue with being at true zero and staying there (you need to verify it once its running and correct either the discrepency physically or within the programming ), its typical to find the balancer off 4* and this wont show up on a scanmaster readout when you look at timing , only looking with a dial back timing gun will tell you where its at
dont forget youll also need a neutral flywheel ,
the JW is SFI and the best but runs about $200. weber does a modified stocker for 155
there is a really cheap Cat china wheel (the gold ones) that say its sfi but a flywheel that comes with a sfi sticker that isnt date punched or applied reads fake , and not all cat wheels are simple bolt on they usually need a little clearance work with a die grinder ..but hey they are cheap and that is what your after right