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i have a 383 sbc scat light weight crank i beam rods falt top srp 21 degree pistons with 1/16 1/16 5/16 ring lands.big hyd. flat tappet cam or mild solid flat tappet cam. double humb heads bowl blended chaber worked too add flow and low compression to 11:1 stainless 2.02 1.6 461 casting stock style screw in studs 1.6 stamp long slot rockers poly locks stock dia. comp springs not the cheap one ither the good $300 set ones. located in cali let me know if interested. can do upgrades at extra cost also have a set of bowtie 21degree heads that would push this too 13.5:1