Well i guess everything i do is just filled with adversity, i have never done any engine or tranny work, but i have done almost all the rest, and had fun doing it too! So i finely get to soup up my rebuilt 390, and the edelbrock rpm i just tried to put on does not fit, well one mount bolt hole is off by about 3/32 or more, so i suppose the push-rods will rub there little tiny holes too!!!!. I hope not. It says they might so i am sure they will. Oh, buy the way merry Christmas everyone and a happy new year to you all. Some of the other bolt mount holes are off too. Disappointed in this intake. Any comments welcome here, tell me what you all think about this. Thanks, MY 390.

 

I'd return it for another from whoever you bought it from.

 

And finally just go with a stocker 4bbl if worse comes to worse.... I have 0 complaints about mine.. of course it for pulling, though.. I drive it like the dickens!!! hehe

 

I bought it from summit, would anyone know where i can buy a new Blue Thunder intake for my 390?? It's a rebuilt (1968) moter and trans stock heads c.i. d2te-6090-aa, or all i can see is the d2te on the heads. I have looked untill i was (ford)blue for a b.t. or a hollamenmoody, and i can't find any, at least new ones. I would rather not have 2ed hand ones unless i know who it is. Thanks

 

D2 heads were not stock on a 1968 motor. C8 or earlier maybe, but D2 heads are from 1972, even thought they are the same as the C8 heads except that they have hardened valve seats, not original.

 

Thr RPM is a good intake. I would still return it for another. The next one would hopefully be better. The BT intakes can be bought from Barry R at www.survivalmotorsports.com and several other vendors as well. Check their site at www.bluethunderauto.com for products and dealer lists.

 

Did you start all the bolts and then snug them down, or install and snug each bolt individually?

 

Yes, intake is laying flat on the gaskets, all the bolts on the driver side are started, 2 are started on the pass side, but seem tight, right from the start, the other 2 are off , but the last mount bolt, after i look down the hole with a light and a mirror i can see the hole is off center by at least 3/32 or more, so all the bolts on the pass side are off it seems to me. I called edelbrock, they are sending me anouther one 2ed air, and said that, that happenes somtimes. So the mount holes should be the same on C8 heads and D2 heads??? I hope so.

 

How much have the heads been cut? That can screw up intake fit.

 

also when i took out the distributor, it came out hard, and i heard a clank, after it was out i looked down the dis hole, and it looks like the shaft is still there but it is slightly off center, when i touch it, it will move back to center, so i don't know what it looks like down there, don't know if it is still OK and where it belongs or not. Any thoughts?

 

I don't know, how can i tell? i have some mikes, and a caliber, but never used them

 

You can look at the thumprints on the intake and deck side. Thumprints on the intake side are sorta rectangle shaped. Thumbprints on the chamber side are shaped like a thumb hence the nick name. On the chamber side you should be looking at about a 1/8-3/16" depth stock. Intake side is shallower at maybe 1/16"+. If the heads were shaved .010 on the chamber side you'd need .007 on the intake to retain the original fitment. Bear is right if the milling was not properly done it can screw the pooch. Making fitment a bitch. If your original intake fit well you should be fine. I'd lean more towards the Edelbrock intake as the issue at this point. Yes the intake mounting holes in the C8 and D2 heads are the same. It's the same casting other than the D2's hardened seats.

 

Yes, the original intake is a two brl, and all the bolts were in and tight, nothing out of the ordenary when i took it off. I did notice one thing about the bolt hole on the original, same one as the edelbrock is just a hair larger in diamiter. That is the hole that was 3/32 or more off on the ede.

 

Just for grins and giggles?? are the bolts that are on the one side that are tight hitting the bottom of the holes toward the intake? or are they hitting at the top side toward the head?

In general if there hitting the top side of the intake hole toward the heads ....the the heads have been milled to much for a stock fitting intake... and if the holes on the bottom side there has been a mis alignment in the fixture from Machining usually do to a clamp or 2 on the drilling fixture being lose....and Have it replaced as your doing....

And hopefully some Dumb A$$ Mechanic did mill or surface grind the intake side of the heads... As I have seen before....then nothing works..other than another set of heads... JMO...

RJ

 

As to the thumbprint, never heard of it. If you mean the part of the head that mates with the intake, the thumbprint meaning the casting that was not machined on either intake or chamber, but part of the body of the head and intake, so if you looked there you could tell if it was machined or not???. How much metal is left on the mating surface?. If that is the thumbprint then there is maybe a 32" or 64th" left of the thumbprint on the head that mates to the intake. not much left to cut off!. Remember i am not a engine man, sorry for my ignorance here.