the price is the best indicator of the quality
Speedmaster/Procomp is a case where I doubt you even get what you pay for
Run!
RUN!!
BTW, the valve length they listed is a LOT shorter than stock replacement 351C valves
I've found them listed @ 5.230" for the intakes & 5.05" for the exhausts
have a look at http://www.alexsparts.com/cate.../FORD-351-CLEVELAND/
I noticed the guide cutters are listed under 351M/400
http://www.alexsparts.com/cate...ORD-351%7B47%7D400M/
here is the best current price I can find for the Lisle 18000, ships worldwide
http://www.ebay.com/itm/Lisle-...279&vxp=mtr#shpCntId
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