Late 80's early 90's bowtie heads?

Hey guys i need some advice. I am building a 355 shortblock. My cousin has some bowtie heads that have been fully ported by b&b machine, they are late 80's early 90's. All I know right now is that they were decked, they have 2.05 int. valves, guidplated, and heavy duty springs. The compression ratio i am aiming for is 10.5:1. Will these heads, with the right cam propel me to the low 12's? How well do these heads flow? I need to decide if i buy these heads or not in the next week other wise he will sell them to someone else, I'm getting a pretty good deal on them so I would really not want to pass this up. Give me some of your opinions. Thanks in advance.

P.S. I do not have the casting numbers off the heads as of now.

Zach

casting numbers off the heads?

Anyone give me a rough idea? Thanks.

Zach

Cant help ya,we need casting #'s man....dont have a clue what heads your talking about.

Had a 3d gen in the 12s with a set of hogged bowties [phase II] back in the day, and that was with a little 292 cam and tight converter. Vic Jr., worked 750dp, 3.89 rear gear.
Pushrod geometry on those phase IIs was ****ty for some reason, get a set of adjustable guideplates and spend the time to set it up right.