in the feb '73 issue of HRM, there's an article on 6 cyl hop-ups. they actually suggested the use of a chevy marine cam (part no. 3891 589) for street use. there aren't any specs given other than "has a higher lift than the stock cam and is available from chevy marine dealers for about $25". course that was 1973, and there are certainly better cam choices now. unless you know your cam part no, this probably doesn't help much. wish i could find a rebuilt 250 for $30 though.
bucky
