In the case of my car, the fog lights and marker lights were downright pitiful to say the least. In comparison to a new car they were hardly adequate for interior lights. Now granted, one had a leak from two rocks punching a couple small holes in the lens, but from what I noticed from my good foglight, just about any can benefit from this.   To start things off, we need to upgrade to a bigger bulb than the 168 (on the left). Here's one that has the right socket, is bound to pump more light, but

I just sold the set of SHP's I had, but the buyer didn't want the springs so I've got them up for grabs if anybody can use them. Maybe $25 + shipping?

I've got the IC from the 89 SHP I just parted. $50 + shipping.

Working ignitor for an 86-87. $25 + shipping