I have a hot rod magazine from '61 that went into technical detail on the "new" ford 221 small block. It was an interesting article and I could fax the article to you if your interested. Some old chiltons manuals would have info too.
Tracy Blackford: Anaheim Hills, Ca www.pacificthunderperformance.com
65 Mustang, 331 custom built with 289 H beam rods and 383W piston, 282S cam, self-ported '70 351w heads, T5z, 9" w/3.50s. 430 HP@6500