Review on Hedman 89510 Standard Uncoated Collector by Douglas Norton

First of all this is for EFI 460, NOT with carburetor. There is a difference between them. The blocks are the same, but the heads and inlet are completely different. However, I used them in my 87 because it has the 95 f350's motor, hence the EFI unit. Installation was easy. I had to adjust the driver's side and gradually tighten everything. The brake line got in the way and also had to be relocated. The oil dipstick also had to be relocated. Right now the trans is a ZF5 with an e4od crossbar, but I have the right crossbar and both are clearing. The EGR and O2 sensor connections are clogged and welded. Even though they are EFI heads and an intake, I have a spacer making the carburetor and don't need them. The truck is definitely quieter and feels better with a real exhaust. I can't say much about performance and efficiency as the truck's entire engine and transmission are different from the original. I am happy with the purchase. Always wanted a set and they are very good. Didn't break the bank and is made in the USA.