3/4 block for base walls

[roundmanone]

In an effort to reduce building costs I have located a salvage yard and they have 3/4 concrete block for $0.60 each. Can you build the base walls out of these blocks? I have also fould a brickyard selling fire bricks at $0.95 each is this the normal cost and does this sound like the proper grade.
What is the avg brick count for a 36" oven?

[dmun]

3/4 blocks are plenty strong if you are going to lay them up with mortar. My concern is that if you are going to dry-lay them the holes in the small blocks won't be big enough to fill with concrete and rebar, and that they won't have as wide a stance to keep them square and upright. If they are from a salvage yard make sure they match: I used freebie blocks from craigslist, and they had all different hole patterns.

Firebricks from a brickyard at .95 usd sounds perfect.

I did a full CAD workout of the 36 pompeii:

http://www.fornobravo.com/forum/f8/3...ayout-171.html (36 inch pompeii cad layout)

and I came up with 171 bricks. You can look at images of the layers there and count them yourself.