I did the weight matching on the pistons and the rods on the first 357 that went into my stang. Very time comsuming, but necessary.
The Eagle kit I got last year, was all balanced already, with the internally (mallory metal), crank. I ended up having to cut, (well, the machinist......I watched), had to cut .100" notches in the intake side, and .045" on the exhaust. (pistons). In either case, they went from 5 cc to 9 cc. (not alot). The weight only changed 10 grams. We weighed all the pistons before cutting, and all were within 1 gram of each other. Other than being 10 grams lighter after cutting, they were still within 1 gram of each other.
Talked to 2 different machine shops, (besides the one that's doing my 41
, and all agreed that while perfect would be great, they wouldn't lose sleep over 10 grams. My (and their), .002
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<font size=-1>[ This Message was edited by: drag79stang on 2/18/02 7:57pm ]</font>