Stock '72 heads vs E7TE Heads?

My goal is a very streetable 200+ HP driver that might see the track once or twice. Will run street tires, stock converter and open rear.

My '72 Sprint currently has a bone stock original 302 w/58K miles, C4 3.00 rear. So far have acquired a 600 Holley and Edelbrock Performer manifold. Plan to add mild cam and headers. Considering better heads.

I started looking for some GT40 heads and came across a pair of E7TE heads w/approx 90K miles for $50. With exhaust manifolds and valve cover off, I can't find any numbers on my current '72 heads. Block is D10E. My questions are:

1. What advantages, if any, do the E7TEs have relative to my stock '72 heads? Valve size? Port size? Chamber?

2. Can I meet my goals with either the '72 heads or the E7TEs? I'm willing to do some porting.

3. Or, should I keep looking for some GT40s.

Got any opinions or advice? Thanks.

Jim

 

E7's have bigger ports, bigger valves, smaller chambers and better flow capacity. to me, it's a no brainer..... go with E7's

 

OK, I'll get the E7s. Would those be roller heads? Maybe I should be thinking roller cam?

 

you can get the most bang for your buck if you buy a used 5.0 engine out of a mustang or Lincoln lsc mark 7 factory rated at 225 hp but more like 250 to 275 slap your carb and intake on and beat the thing to death

brad

 

roller cams are not head specific... yes those heads came on the roller blocks but you dont need a roller cam to run them

the only difference between the roller and non roller blocks is the roller block has deeper lifter bores to account for the higher lifter position

 

I'm using E7's, I just finished porting them (actually easier than I thought) I've also read that ported E7's will flow as good as GT40 heads, and for the price E7's, seem to be alot less than most people want for GT40's (around here atleast).

 

Thanks for the suggestion but I like my numbers matching '72 block. Jim

 

Sounds good. Got any references for porting instructions? Jim

 

Think there's a roller cam in my future.

 

http://www.diyporting.com/

Plus I guess it depends upon what you have for equipment, I used my dremel tool and I bought a kit from Standard Abrasives, for my air grinder.
(But I see they have changed their site..have a look at Summit, they sell their stuff)

 

Ummmm, No.................They don't have bigger ports or valves, nor are the chambers smaller. They DO flow better in stock form than the 70's heads. Even better after doing some port work on the exhaust and bowl blending on both sides.

 

I think you just contradicted yourself....

Numbers matching isn't a big thing to have in a maverick.

Plus your already looking at swapping heads will make it a non numbers matching motor anyways...

 

But the block has the same sequence number as the car, not the heads....

 

If he's wanting to keep it "numbers matching" then swapping heads and stuff would still make it modified.

I understand not wanting to get a different block, just I wouldn't worry to much about keeping it a "numbers matching" car if he wants to go fast.

 

Didn't mean to start a controversy -- I just like the idea of the correct serial number on the block. To each his own.