74 Spider Intake Question

[Lotus]

I have a 74 spider with the mechanical choke/mechanical secondary carburetor and I hear that is a decent carb. I have a rebuild kit on the way for it. My question is the intake that is on my car is probably the stock one...would I see an upgrade in performance switching to the 79 single plane intake that I see everyone talking about? I figure now is the time to do it if the carb is off getting rebuilt.

Second, if it is worth swapping out the intake how much should I expect to pay for one? I don't see any on ebay at the moment and have seen them go from 25 to 200 in old ads.

Thanks,
Pait

[fiat218]

I'd say 85 to 120 plus the shipping cost
. As I seen them selling for ( 1800 intake )

[TStark]

Is there confusion? i thought the 79 intake is the dog.

[Lotus]

Is there confusion? i thought the 79 intake is the dog.

That is what I see mostly but then I see some say single plane 1800 (and I think the 74 is single plane). I thought I saw somewhere but can't find it again though is the 74 single plane has smaller holes though and doesn't flow as well.

[Sparky]

The '79 was a carbureted 2L, first year of the 2L and last year of the carbs. I'm not sure which intake manifold it used, but I know all my 1800s had the single plane, at least 2 of which are '78s.

I'll post up one of the intakes for sale when I get home from vacation ($100+shipping). I have a second (extra) one with a known working weber 34 carb from IAP on it already, but I may save it as a backup in case I can't get my 40idfs working...

If you're looking for max power or turbocharging, the absolute best manifold I've come across is a Lancia fuel injected deal, but it'll need someone with a British or Australian rhd car or master cylinder relocation to make it work =(

[Fiatlanta]

If you REALLY want a '79 intake, I have one I just took off...and replaced with an earlier single plane. But I'm pretty sure it's NOT the one you want...it'd laden down with emissions crap that you couldn't use on your '74, even if you really wanted to.

[narfire]

I believe most 79 and carb'd 80 intake manifolds end up in the recycle bin or boat anchors. The single plane intakes were a better intake.