'Nother Noob question: L20- intake manifold options?

[hessianben]

I've had limited success searching for the answer to this question-

 

(-feel free to call me names for not being able to search things properly! :P)

 

I Just pulled the L20b from the donor truck (79 620) and am cleaning it up to

drop it into the 521...

 

First, now I understand what everyone is bitching about as far as removing the L20

intake and exhaust manifolds!!!

I had to pull the head just to access the bottom bolts because of the stupid heat

shield and smog crap !!!!:mad:

phew!

 

anywhoo- the intake has a smog doohickey attached to the side and so does the exhaust (tubes running through each manifold head to a connecting rail).

I've seen pics of the exhaust mani, where people have just cut and pinched off

the tubes...

 

 

...just look at all that crap!

 

 

 

my question is: will intake manifolds from L16, L18,ect... work for the L20, or are they different diameters?

I'm almost positive they're all round-port.

 

Also, is there a exhaust manifold from any of the years that didn't come with

smog crap, that would also fit on the round-port L20?

 

thanks!

 

[hessianben]

found some better photos:

 

[datto510]

I had a exhaust manifold like that. I soaked it in PB blaster for a couple of days and then took off the emmisions stuff. I got some 19mmx 1.5inch bolts and stuck in the holes where the tubes went. Then I cut off the heads of the bolts and ground it down smooth. You would never even know they were there!

[hessianben]

Any ideas about what to do about all the crap on the intake?

I have it some love with the BFH, and it doesn't budge!

If I get it off, I wonder if there is a huge hole i'll have trouble covering...

Maybe better to leave it all on, and just block off all the ports?

[mike]

Go get one of those little propane torches from lowes or home depot and wear some thick leather gloves.

 

Did you break the bolts/studs that hold the EGR crap on? I used a short piece of oak/hardwood and a 5 pound sledgehammer and beat the hell out of it when it was hot. Took a bit of work but I got it. You could always put it in a vise and use a sawzall too...

[hessianben]

Go get one of those little propane torches from lowes or home depot and wear some thick leather gloves.

 

Did you break the bolts/studs that hold the EGR crap on? I used a short piece of oak/hardwood and a 5 pound sledgehammer and beat the hell out of it when it was hot. Took a bit of work but I got it. You could always put it in a vise and use a sawzall too...

 

hehe sawzall.....:D

 

Yeah, i busted all the bolts loose, hammered on it a bit-

didn't want to give it too much and break something right off the bat-

 

But, yeah, the torch is next!

thanks

[Pacific coast Datsun]

Yes the L 18 & 16 intakes will bolt up. The L 18 will also have smog devices on it but its not as cluttered as the L 20 one. The L 16 unit has 1 port that i plugged [on end under carb]...

We have a few L 16 intakes available here if your interested...Ratsun priced of course.

[hessianben]

I may have to take you up on a clean L16 Mani-

 

I could use the on that's on the L16 on the truck now-

but I'd like to keep that motor complete.

 

You said you plugged the port under the carb?

Do you mean the coolant port?

If so- did you have to block off the ports to the head also? (and, how?)

 

THanks! (pm me about price on mani!)