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I did some poking around earlier and found that if I were to go with a 70 or 73 intake I'd need a spacer to use the Edelbrock or Holly I already have. Using the tinfoil ball method I find with the original hood pad there is just about 1/2 inch clearance. So I'm not inclined to use any kind of...

Flat hood. The 73 car did have the snorkel hood. Engine is installed with its Edelbrock performer intake still attached. Will install the Edelbrock 1406 carb and stock air filter housing, and do the tin foil ball trick later, but suspect there will be no real issue. The 1406 will not work with...

Have no idea what TQ I have, will assume a totally stock 727. But cant do a 600 or 1000 cfm carb with the 70 intake?

Why the 73? I'd think the 70 would be a better match with the 1970 X heads?

Yes, ment carb aside height difference. Would love to see some blueprints on both intakes, but I'd guess that's not happening anytime soon. Lol

Always something new to learn here. :)

I obtained a what I thought was an almost complete stock 73 340 minus a factory intake. Pulled the valve covers yesterday to get the head #'s and found 1970 2531894 heads dated 01019 and 12268. I already have a 73 340 3671918 intake manifold, and I am wondering if its worth my while to swap that...

My aunt caught me washing car parts in the kitchen sink once. Didn't hear the end of that for about 6 months... Ha!

found.

Found.

Looking for 3671918 72-73 340. Thank you.

You might try going back to what is possible the original source. Detroit Eaton spring. Tackling the rear leafs on my 73 Z-28 in the spring and got all the parts I needed from them.

I only needed the back portion to repair my bucket seat. $140 that includes shipping anywhere in the lower 48 takes it away. Any kind of payment is fine or paypal. Pm me if interested. Thx John

Ahhh yes, California specifications. I think that explains the Z rating. They led the emissions charge a few years early. My 73 Z-28 has the remains of the spark control system on it as well. I see what to look for now...

Wouldent the Z intake be into the mid/late 70's 80's temp vaccum control? Once had a 68 396 with date codes block heads and intake all within a few days of each other. Pretty cool stuff...

Yes am very aware that even a tiny change can mean a new #. But here we have the same# but A or Z. Maybe its one size fits all A to Z. LOL

Picked up a 73 340 and looking for the correct intake manifold which I see is 3671918A but, now I see a 3671918Z. Is there a difference to be concerned about? Thank you

Go for it! Remember, you only live once.

10-4 thank you!

10-4 to that! Need to find somebody who did break theirs so I can find out what not to do...lol