Trying to ID BBC Heads....

[geemann51]

I'm trying to help a buddy out.....

He has a pair of BBC heads that he is going to use in a 427/57 Chevy, anyone have an online source to run the numbers against spec? They are 3919840 for any who might be curious. Thamks.

[plan9]

3919840

chamber vol - 104.9
intake -2.19
exh - 1.72

came on 396,427 ci in yrs 65-69

additional comments: high perf, large port 375hp 396, and 425/435hp 427's

got this out of my BBC book, some good heads he scored http://www.jalopyjournal.com/ubbthreads/images/graemlins/smile.gif

didnt have the intake runner size... can take a look in some of my other bbc books

[Joes50]

3919840

1967-69 rect..closed....396, 427

That's what I find anyway..............

[Paul]

I don't have my books at home, I loaned 'em out!!

doing a search on line I come up with various data,

chamber cc- 104.9, 107, 109 (closed)

intake valve diameter 2.06, 2.19

exhaust valve diameter 1.72, 1.88

but I don't see any numbers on port runners..?

also a few applications, COPO L-78/L-71/L-72

looks like a good candidate for a dual grind cam,

prepped right, your buddy should be able to make a streetable 450-500 HP relatively easy.

what block?

[CharlieLed]

The website that you want is www.mortec.com (http://www.mortec.com)
Here's what they say about your casting #:
3919840....67-69...rect..CLOSED..396, 427, 107cc chamber

[Flipper]

I had a set of those. It's your basic closed chamber, rectangle port iron head.

Not bad heads, but I would hold out for a set of open chamber heads. They flow better and there are a whole lot more choices for pistons. Save your pennies and get aluminum heads while you are at it.

[Paul]

Flipper, like these?

(reworked 074s)

http://photo.starblvd.net/60s_style/6-3-5.jpg

yeah, there's lots of better choices out there, some of the recent aftermarket stuff looks good, like the AFR heads fer instance but,

and I repeat, if the combo is done right that motor is gunna kick ass over almost any other pre '69 motor.