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360 or 5.9? Might be silly but if it's a 5.9- Timing chain tensioner? They can sound like the engine is getting ready to explode, or that there's two dozen marbles or ball bearings in the crankcase.

Nice try.

Did I miss how the engine and trans mounts were addressed and any clearance issues? I have several "spare" running Mopar engine/trans and frequently see brand x and y projects without engines. My favorite was a nearly rust free 65 ford step side truck for $600. If I knew a 318/904 would bolt in...

Agree the ECU (brain) must be grounded. Timing can be set 'seat of the pants' by advancing until ping under load, then retard a hair. Still like to see the whole car, clearly showing the engine.

3 pages and no pic of the OP's 318 mustang yet?????

that was the last piece I needed to finish collecting parts for a 4 speed conversion hard to find and when I did people wanted a fortune (like more than I paid for the clutch or pressure plate) I finally found one at a swap meet for a decent price Maybe that's why

..."moderate" 1200 HP at the wheels... Uh, moderate?

There's a reason Mopars don't have/need 4 bolt mains. Unless you get into ultra high end power.

Stock 165,000 mile 5.9 ext cab 4200# Dakota R/T with 3.92 gear Will boil the tires sideways until I let up.

I'll just cut to the point this thread will likely go in 16 more posts- "just" stroke it to 416, get a 3500 RPM converter, a solid roller cam, aluminum heads, and put it on the bottle. oh, and "agree" on the 512 lift cam

there are two fairly extensive threads on this already. one has the limits of the factory head castings RE cam lift. IIRC the crate HP numbers are old school "gross" versus the factory installed "net" of the 5.9 at 245, so that unmodified 320 HP crate gross is the stock 245 net.

If that's the Mopar 284/484- There are two cams with those specs- different center lines. Must be the tame center line version if there's no lope. The one I had loped like hell in a 9.5:1 383. Sounded like two Harleys!

In 1970 the 318 was 8.8:1 compression. In 1973 it was 8.6:1. Not a terrible difference. My bone stock (except for dual exhaust) 73 318 pings like hell on any more than 0* advance running 87 octane. 89 does not help, and I ain't putting 93 in a 73 318-2 motor. Chrysler claims that dual...

"Magnum" heads form 92-04 will get you a compression increase, and 1.6 ratio rockers (like getting a slightly larger cam), but you will need new oil through lifters and pushrods, and a magnum or dual bolt pattern intake. There is concern that magnum heads are prone to cracking, but there is...

Agree on exhaust. My '00 R/T has cat-back duals...and it helped. You could put on a '92 3" manifold flange and crossover setup, and then cat backs. I need to measure mine to verify, but I think that's what I have.

I was looking at the year by year specs on mymopar.com (yes I know they have a few errors), and it seems that the baseline of the dyno test is pretty dang close to what the spec is from the factory. I wonder how my '69 10:1 motor would do with the same mods... ...and I also noticed the specs...

It's also nice to see real numbers for some of the most common "old school" mods. Many of the newer builds do so many mods at the same time, and so many mods period... It's nice to have a relatively concrete point of reference.

I'll say it again, I absolutely love the "scientific method" analysis that's going on here. Way too many times people just "shotgun" a project, and then if one of the things that was added or changed happens to work, everyone's happy. The problem with that, is it doesn't build a knowledge...

VERY nice.

PEAK numbers are moving, but street use ranges are still good or even improving as well. I always knew my torker intake didn't rob me of low rpm torque, even though everyone else seems to think so.

I have to check myself whenever I give my two cents worth. If it contains any sort of psych advice, I have to mark it up to five cents.

I love the scientific method testing. Too many magazines say "we normally wouldn't do this, but we changed everything at the same time...)(so you don't really know which mod helped the most, or how they affect each other.) IMO, that's pretty much what they NORMALLY do, so they should just stop...