Hope this is what you are looking for –
[show_custom_post_types post_types=”portfolio” post_count=5 excerpt_count=70 show_meta=”false” hide_thumbnail=”false”]
or simpler, as in home-page-6, you can use –
[show_custom_post_types image_size=”medium” post_count=3 post_types=”portfolio” excerpt_count=150].
Use column shortcodes like [one-half] to display in two columns if you find a single column to be too big for your needs.