I have a modified stock fuel pressure regulator for sale. Fits 305 and 350 TPI cars. I had it on my 91' 350 TPI and went to a Holley dial regulator instead. This is a modified stock unit and works well. The diaphram inside is basically still brand new. Used for less than a week. The stock diaphram itself goes for about $80. This unit adjusts using a 7/16 in open end wrench. This unit adjust from stock setting (apprx. 43.5 psi on up)

Selling for $30 shipped.