Was there ever a LA 318 4 barrel intake from the factory? Is so, what was the casting number?

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Great question. I don’t think there was. Just like there was never a 2bbl 340 that came from the factory.

Yes, mid 80s Diplomats cop car motors
Thats the only one I know of

Yes, 1976 and later I believe
Mopar used some Quadra Jet carbs also in the mid 1970s, 1976 to maybe 1982 but I'm not sure if they had different intake manifolds or not than the same year Thermoquad carb. motors used

They were available. Not sure exactly what years. I know for sure 1980 aspens with California emissions had them. I know there were others possibly on some trucks. All the factory ones I recall would be spread bore for a thermoquad or quadrajet card. Remember most la318 heads have smaller ports. So you most likely would want 340 or 360 heads.

Was the intake port size 318 or 360 size? Or was a 360 intake used on the 318 heads????

The intake ports were larger on the 4 barrel versions. So the factory 318 engines with 4 barrel carbs would use the larger ported heads. I believe the heads were the same between the 318 and 360 4 barrel designated engines.

I had an 84 Grand Fury police sedan. It had 318 with Quadrajet carb, 360 intake and heads on it from the factory.

318 4bbl intake? yes and no.

The factory put 360 heads and 360 4bbl intakes on 318's, so I guess technically it's a 360 4bbl intake but that's mostly hair splitting. I've put the 360 4ll intake on a normal 2bbl 318 and while some will talk about intake revision due to port size mismatch it's never been anything other than an improvement on a street car.

As for no 2bbl 260's, that's not true at all.

Think he said "no 340 2-bbls."

I need a new set of eyes apparently

How about three two barrels? Does that count

I thought that there was a 1975 Fury based Road Runner that had a 170 HP 318 4 barrel. I know that the Diplomat and Gran Fury police cars of the 80s had 318 4 barrel plants.

I also thought the 73-4 Road Runner with it's standard 318 had a 4 bbl.

1978 was first year, a 360 intake on 318 heads. IIRC, it was a police car only option that year.

My Dad had both 73 and 74 Road Runner's with 318's brand new. They were both 2 barrel, dual exhaust. I ran the 73 at Milan Dragway. 15.90.
Doug

Okie dokie. Good to know

I have a 1987 E58 4 bbl quadajet 360 from a 87 PU truck.

When Chrysler put 4-bbl mflds onto their 318s, the intake mflds were from 360s ... and they also installed 360 cylinder heads which had the matching larger intake ports for the 360 4bbl intake... they were smart to do that.

For the 72-74 (??) road runners, that had the 318 in them . . . exhaust manifolds were port sized for 360 heads . . . they were even cast with "318 - RR" on them . . . note the right hand one had no heat riser drilled . . . used these on the 360 in my Sport Satellite . . .