Sorry-- I used to actually know that stuff, but my little mind has a finite capacity, and when I learn new things, it overwrites the old

 

Just guesses, but:

H should be the HP engine package.

No clue on the G, but 5th didgit should make it an engine option.

350, or Super Red Ram was the predecessor to the 383, circa mid 50s?

331, 1st hemi, out early 50s or so?

The was a 170, 198 and the more common 225 /6's.
How'd I do?

Here's one for ya: What are the three variation on the 318, and basic distinction between them?

 

I'll try(and probably look foolish...) the 318 quiz...There was the big polyspherical 318, then the LA-based 318-2bbl and the LA 318-4bbl?

 

Close but:

318 poly "wide block" Really the same or very close to same block as the LA, just looks wider due to the poly head.

318 LA, the one everyone's famailiar with, at least us old farts.

5.2 Magnun (rollers, TBI). 5.2 was the "new" 318.

Sorry to see that motor go. The one in my 2000 4wd w/NV3500 gets 20mpg highway. That's a 4x4 6,500lb club cab gasser. It's a real dog speed-wise, but a great running combo for light duty.

 

I had a poly 318 in my '66 Coronet.

Actually, the main difference in the "magnum" 318 wasn't the roller cam and TBI. The roller cams came back in 1985, along with the closed chamber "-302" swirl port heads. TBI was introduced in the 80's as well.

When the Magnums came along in 1992, the main difference was the stud-mounted rockers that used pushrod oiling. This was a huge departure from the traditional (and superior, imo) shaft-mounted rockers that oiled through the heads (oiling holes from block fed shafts).

Alas, the 4.7 SOHC engine replaced the 318. Sad to see it go.


The good news is that 318s are a dime a dozen, and you can easily stroke one with the new 4" crank to 390 cubes. This gives you a long stroke engine with lighter pistons that many, so you get good bottom end AND quick throttle response.

Diamond racing and KB pistons both have quality forgings for stroking a 318 out to 390 cubes. PLus, you can get higher compression with a nice flattop piston.

You could build a monster LA mopar on the cheap using a factory block and a stroker crank. Best of all, a stroker SBM has a better rod ratio than many STOCK GM engines. Thank you Chrysler for tall deck heights.

jh

 

I did not know that. Haven't seen one taken apart yet, either. Hopefully won't, cause that would mean the gasser pickup is broke!

 

DOH!! I knew I'd look foolish...actually I wasn't counting the Magnum as a different type 318, as mentioned above, the only real departure was the oiling system - which can be adapted to an older block - if you wanted. I didn't think that would deem it another 'version' so to speak(so really, my rendition of the 2bbl/4bbl being different is even LESS different, there ya go!!)

 

I can relate. Building a hot Chrysler RB motor takes a lot of cha-ching, but unlike the GM 350's not everybody has one!

 

nice ace but...................
h = 340 4v
g= 383 2 v
other than that you get a A for effort as no one else tried

 

That is a really nice truck wish mine looked that good