Dm7x09

Alright so im getting a 1970 Plymouth Roadrunner and I want to build the engine scratch. I dont want to get a crate engine because of one cost, two I want to do it and it might seem irrational to some but you have to start somewhere. Now heres the problem, I want to make a 440 6 pack for it but however have no clue as to what even makes the 440 6 pack different from the 440, little help? Not only that I have personally never just completely built an engine from scratch which is have the reason I want to After reading a little here and there well I have to say it can easily get confusing, so anyone wanna explain or give some advice on building the 440 6 pack from scratch? Im not worried about making it completely legit or anything, dont need numbers to match or anything either. Just want to know things like what part works with what. I mean im going through it and I see how this bore size works with this or that, or just the block itself has different bore sizes, or clearances for the valves, or cam bearings, etc any help or advice would be GREATLY appreciated, thank you!

78D200

Welcome!

Here is what I have come up with for a "list of what to do" when it comes to any project (motor build is no different)

1. Ask yourself what is the purpose of this?
   1. Try to be as detailed as possible. Ask yourself a ton of questions or have us ask you. This being your first build, I would suggest asking the forum as we have a few very knowledgable engine builders.
2. What do you need and what do you want?
   1. All of us have wants but the needs should always be the first that you address.
3. Plan what you need to do with a timeline (optional) and what needs to get done before you can move onto the next step.
   1. This will help keep the build going when you start, and create less stress for you in the long run.
   2. This is also where you should try and ID what some of the roadblocks that you may incounter and what you can do to get fix it to get yourself back on track with the build.
4. Once your plan is set start collecting everything that you need.
   1. Don't start the build till you have everything you need.
   2. This is where your plan comes into place. You don't want to install cam bearings before sending the block out to be cleaned and inspected for example.

Don't be afraid to ask the forum for help with it either. There are a ton of great people here.

bremereric

Welcome aboard.

rickyr

welcome

TVLynn

Assuming a 500 hp street motor. I would start with zero deck hypertectic pistons
10/1 compression .020 oversize ? Bore & hone with a deck plate. resize the crank & polish 10/10 A new set of aftermarket rods and a balance job.. ARP main studs, a roller timing chain set up, That would get you a very reliable short block
Next would be the heads. A set of Eddelbrock aluminum heads would be nice
Intake 6 pack if that is what you want ??? A nice 4bbl with a 850 Holly ? would be much easier to tune, In theory produce more HP !

MReeves

I'm no engine builder so won't confuse that issue... Just wanted to say welcome to the forum.... Be sure to checkout the Mopar of the Month contest... See the sticky for the simple rules and then you can help choose the monthly winner.....