Thanks for giving the guys the heads up, Neil.
The Holley Black Changeover kit has been discontinued in favor of using custom 12mm to -8AN fittings, with high quality 90 degree sweeps and stainless braided line.
One of the issues that prompted this switch are some recent problems that we ran into while using the Holley Blacks on the Dodge trucks. We found that many Blacks were "dead out of the box" and that idle pressure after install was around the 10 PSI range. Talks with Holley netted us zero results, and all we got was the company line "This pump isn't rated for use in diesel fuel".
After cracking open a couple Blacks, we discovered a faulty internal bypass that needed cleaning up. Some rough edges that needed to be filed down, and the entire assembly cleaned with brake cleaner. After performing the service, pressure came up to 16 PSI at idle, and stayed up to around 12-13 at WOT. But we were uncomfortable with Holley's response to the situation, and quit recommending the use of the Holley pump.
While we were sorting these issues out, a few customers used the Holley Black kits in tandem with their stock lift pumps, and discovered that pressures were very good up to the 375-400 HP level, and the lift pumps were holding up well once the back pressure had been eliminated from the outlet side of the Carter lift pump. However, the Holley kits were a bear to install on stock lift pumps, so we wanted to something easier. Further digging led us to a couple companies that were building the 12mm to -8 adapters, including a fitting with a 1/8" tap for a fuel pressure gauge, and we found some nice sweeps with swivels that would lock to stainless line. The nice part of the new kits is the complete elimination of banjos from the injector pump supply side (except for the inlet of the factory lift pump. This banjo, when replaced with a high flow bolt, doesn't appear to hurt anything).
We're now up to the 40K mark on a couple test trucks (each at approx 375HP) using larger lines, and pressures have remained strong. 15 PSI at idle, 10 - 12 PSI WOT. We think the new lines, which are easier to hook up, and will cost approximately the same while not requiring the high flow bolts, should be a decent rigging.
Following the lead of some other respected diesel performance vendors, we also contacted Product Engineering about their 4200 series pumps. Following several lengthy conversations with the creator of the pump, it was discovered that PE feels their pumps will work great under the hood of the truck, as long as the inlet of the pump is not higher than 1. 5 ft above the bottom of the tank. By the middle of next week, we should have a custom bracket built that will mount the PE pump to the frame, under the hood and out of the elements. The -8 line kit can then be used with the PE pump, and it appears as though the 400 HP+ crowd will benefit from the use of this heavy pump.
As a side note, we're getting some custom fittings machined for the 03's as well that will eliminate the stock lift pump and replace it with a PE4100. We're hoping that this will eliminate the problems found at about the 560HP level where the low pressure side of the injector pump is emptying out.
Attention: TDR Forum Junkies 
