Thread: Help identifying cylinder heads

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Thanks Glenn. I had separate threads because I figured I would separate the issues. Anyway, here goes.
1968 Camaro
Turbo 350 w/ B&M 3500 stall
4.11 rear

Motor - I bought the motor 15 years about when I was 20 years old. Now I'm older and have money I want to get the car done.
406
cast crank
5.7" rods - I would like to have ARP rod bolts and have them resized
flat top pistons - hoping for around 10.5/1 with the 64cc heads
Victor Jr. intake
750DP Demon carb
Hooker 1 3/4 headers

Basically, I want to use this motor to build off of. I want about 425-475hp for low 12 second times.
Where I'm stuck is the cam/head combo. I know the pics of the heads make them look like crap, but they seem to be
decent. By decent I mean 2.02/1.6 valves, 1.5 or 1.54 dual valve springs with damper, valve guides, rocker studs. I don't
think they are production heads because they have no casting numbers. I really want to figure out what heads they are.
I thought I remember the guys said they were old Dart II iron heads, but that's what I'm trying to figure out. Anyway,
they seem decent enough for now. Yes, I would like the AFR heads, but, I'm just trying to get a decent rebuild and get
the motor in the car. Once the short block is built, I can always upgrade the heads.

I do realize the cam is a bit aggressive. Again, I bought it when I was 20 years old and had this grand idea of the motor I was
going to build with no money. lol And roller cams are not cheap. I would hate not to use it. But again, if it's too aggressive for
this build, I will probably go with something like a Comp Cams 280 Magnum. Overall I think it should give me the 425-450 that
I want. Once I have the car running and driving, I will continue to upgrade the car as I go. But I don't have $5k to build a motor
with. I'm trying to use the 406 that I have and get it cleaned and assembled and then use the heads with a smaller cam for the
time being. I'm thinking if I went with a flat tappet cam, I wouldn't have the clearance issues with the rods that I have with the
bigger cam. But I may be wrong.

Just getting pricing from the machine shop they are really expensive. They want $240 to install the ARP rod bolts and resize the
rods. I could buy new rods with the bolts for that price. I live in the Chicago area and there are only 2 real machine shops in the area.
I'm trying to figure out if I build this 406 or just buy a 383 short block assembled and delivered to my door for $2100 from Summit
Racing. What do you guys think. I think this is a solid motor setup once I get the proper cam. But I definitely would like to hear your
opinions since I've never built a motor before.

Well I have confirmed that my heads are in fact Dart II sportsman 64cc chambers and 200cc runners with 1.55 valve spring pockets. I think these heads are good for 420-450hp.