Schiff is a libertarian, much like Browne was. However, unlike Browne, he doesn't buy so much into the premise that one cannot predict the future. He does hedge his bets somewhat though. He has a staunch belief that the spendthrift, money printing, bloated government entity that is America is going to experience economic doom in the form of strong inflation. In the process, emerging economies are going to eat America's lunch. This is reflected in his portfolio recommendations.
He likes gold, gold mining stocks, foreign bonds, and foreign equities. The only U.S. assets he'll hold are cash itself for liquidity purposes.
There's isn't any single place in his books where Schiff has laid out a table for an overall allocation, as he seems to prefer long form explanations. However, by combing through his material you can see he makes allocation recommendations in a piecemeal fashion. As such, I've managed to piece together a "Peter Schiff Portfolio" as follows:
25% - Domestic cash - VGSH
25% - International bonds (unhedged) - IGOV
37.5% - International dividend paying equities (unhedged) - VYMI
6.25% - Gold - GLD
6.25% - Gold mining equities - RING

I've taken the time to pick some ETFs that I thought would be the most appropriate and representative of his recommendations. Portfolio Visualizer doesn't have the data for some of these assets, so backtesting is limited. However, we can get some limited information using the return data of the underlying funds themselves.
Overall, not a crazy portfolio. It looks a lot like the PP but with a bias against the U.S. and an inclination towards dividend payers. The gold mining stocks also give the portfolio a leveraged bet on gold. I personally wouldn't be too comfortable having no exposure to the U.S. markets. However, if a small allocation to U.S. stocks were included in the equity portion I wouldn't have big qualms about the portfolio.