Originally Posted by 69CoronetRT
Originally Posted by NachoRT74
Originally Posted by 375inStroke
Specs are
383 2V, 330HP 4V, and 350HP 440
256°/260° .425"/.435"

335HP 383, and 475HP 440
268°/284° .450"/.458"




So, any 383 4V is a magnum still with standard cam and springs, and all got HiPo exhaust manifolds. But the 335HP is a magnum "plus"


No.

The 383-4 335 horse was introduced in 68 with the Road Runner. The difference between it and the 330 horse assembly was, basically, it used the higher lift cam and springs introduced the year before in the GTX and Coronet R/T. The carb was different than the 330 horse as well as the 335 was intended to get a windage tray.

The 906 heads were used on all 68 big blocks. The springs were different with the 335 but not the head casting.
As Dan stated earlier, there are no HP exhaust manifolds. There are two and 4bbl manifolds.

When Dodge brought out the Super Bee mid year, they used the 335 horse assembly and called it the Magnum.

The 335 horse variant of the 383-4 was used from 68-70. The applications changed each year. In 68 only the RR and SB without A/C got the 335 assembly.
In 69, any B body with manual transmission without A/C and the RR or SB with either transmission and without A/C got the 335 horse version. Any 69 B body with A/C got the 330 horse. Any non RR or SB B body (Charger, Satellite, Coronet) with automatic transmission got the 330 horse.

The 1970 applications get a little more convoluted with the use of the 335 horse in B and E bodies. However, there was a 335 horse assembly available with A/C in 1970.

Properly and originally, the term 383 Magnum refers to a 68-70 Dodge with the 335 horse version. Dodge did use the term Magnum on other engines after 1970.

So....
1968: 383 Magnum in Super Bees without A/C.
1969: Manual transmission B bodies without A/C OR a Super Bee with either transmission and without A/C. So no 69 Charger with A/C or automatic would have the 335 horse Magnum.



This is correct. I have a 69 Fury III auto with the 330 hp engine, and a 69 RR 383 4-speed with a/c that also has the 330 HP engine. Both these engines came factory blue paint (I use to hate that my RR has the blue motor and a/c, lol). They both have the flat top 10.1 pistons, both came with windage trays installed, and have the 906 heads with dampner coils inside the valve springs.

It is my opinion that the cam was a bit smaller on these 330 engines, as I was told, once upon a time, the air conditioner caused to much drain with the regular RR cam at an idle. I notice when I rebuilt the 69 Fury engine with the regular RR cam, the engine had mild lope that it did not have with the 330 hp cam.

Take this for what it's worth. wink

Last edited by jimmy; 11/28/19 05:25 PM.