BB head specs needed - 6272990

[JHS]

I have a set of "990" heads, 1973 dates, that I need info. on. These heads are not listed in any of the books I have and I am trying to determine the specs. and their application. Why are these heads not listed in the Colvin book? Are they common heads and, if not, what are they worth? Thanks.

[FANTASY FACTORY]

6272990 1971-94 454 Open 425, 118.0cc, IP 325cc

[JHS]

Thanks.

[427king]

Joe , Open chambers w 219 188 valves[basically L88 iron heads] they are around 400-600 for cores 900/1000 or so done..not a numbers head

[JHS]

Thanks Chuck, wondered why I could not find any info about them.