Item's you have to make including parts and materials:

Big Iron Bomb x20 (Requires 10 crafts)
3x Iron Bar x10
3x Heavy Blasting Powder x10
------->1x Heavy Stone (x30)
1x Silver Contact x10
------->1x Silver bar x2 (1 Silver bar = 5 Silver Contact)

Mats required:
30 Iron Bar
30 Heavy Stone --> 30 Heavy Blasting Powder
2 SIlver Bar --> 10 Silver Contact

Solid Dynamite x20 (Require 10 crafts)
1x Silk cloth x10
1x Solid Blasting Powder x10
------->2x Solid Stone x10

Mats Required:
10x Silk cloth
20x Solid Stone --> 10x Solid Blasting Powder

Explosive Sheep x5
2x Wool Cloth x5 (10x in total)
2x Heavy Blasting Powder x5 (10x in total)
1x Whirring Bronze Gizmo x5
------->2x Bronze Bar x5 (10x in total)
------->1x Wool Cloth x5
1x Bronze Framevork x5
------->1x Medium Leather x5
------->1x Wool Cloth x5
------->2x Bronze Bar x5 (10x in total)

Mats Required:
5x Medium Leather
5x Wool Cloth --> 5x Bronze Framework
10x Bronze Bar
+
10x Bronze Bar --> 5x Whirring Bronze Gizmo
5x Wool Cloth
+
10x Heavy Stone --> 10x Heavy Blasting Powder
10x Wool Cloth

(Basic Mats: 20x Wool Cloth, 10x Heavy Stone, 20x Bronze Bar, 5x Medium Leather)

Basic Mats in Total:
20x Wool Cloth
30x Iron Bar (30 Iron Ore)
40x Heavy Stone
20x Solid Stone
20x Bronze Bar (10x TIn Bar + 10x Copper Bar)
5x Medium Leather
10x Silk Cloth
2x Silver Bar

The total base component requirements are:

2 silver ore
30 iron ore
40 heavy stone
10 solid stone
10 silk cloth
20 wool cloth
10 copper ore
10 tin ore
5 medium leather

Using the powers of Excel, I calculated the full mats list for this quest:

Heavy Stone x 40
Solid Stone x 20

Bronze Bar x 20
Iron Bar x 30
Silver Bar x 10

Medium Leather x 5

Wool Cloth x 20
Silk Cloth x 10

This gives you everything you need to complete the quest.

Since there were people asking here about the differences between gnomish and goblin engineering. As you all know, you can specialize in one of them when you've reached level 35. For the horde, you need to speak to Tinkerwiz in Ratchet, he will then direct you to the goblin engineer in Gadgetzan. I don't remember how it was for gnomish, but anyway, let's clear something about the actual difference.

To say it succintly, goblin engineering is: bombs, bombs and more bombs. You have all sorts of big bombs that makes things blow up. One particular bomb is above all: The Big One. It has a huge blasting radius (10 meters) and it will stun EVERYONE inside it, and it seems it cannot be resisted. This thing comes with a price though, unless you know an alchemist who can make you some goblin rocket fuel, making this will be quite expensive. There's also the Goblin Rocket Helm, my favourite! I'm a hunter, so sometimes I get stuck in melee combat, especially in PvP. But, after I got this, the little coward thieves who call themselves "rogues" are very easy to beat. Just use this to a rogue, and the rogue feels how is it to get sapped! Just beware of doing any damage.

Gnomish engineering. Lots and lots of funny weird gizmos that are effective yet unreliable. For example, there's this Gnomish Death Ray. Sure, it can crit 4000... but, what about when it does that to YOU? And, with the gnomish shrink ray, there's two risks: a) it might ENLARGE instead of shrinking b) it might shrink you and your PARTY. But, if you're brave enough and willing to take these risks, go on! I'm sure it will be great fun.

I personally prefer goblin engineering, because I&nbsp 'm always after 100% reliance. Although manufacturing The Big One is quite expensive (1-2g at the very least), ten stunned enemies around one Arathi Basin flags is a thing quite worth seeing. :)&nbsp

You have to get a referral quest from Tinkerwiz in Ratchet (http://classicdb.ch/?npc=3494) before this guy will talk to you.

Before you can get this quest you must pick up the quests "Goblin Engineering" or "Gnome Engineering" which start in Ratchet, Undercity, or Stromwind.

It seems some people keep missing this detail.