[455firebird1969]

Originally Posted by Formulabruce

Sweet Set up!! Love that build. Lots of thought went into that engine build.
How is the vacuum? I noticed brakes are manual?

I can’t take much credit for the thought that went into this build. The Jeep guys have been building similar engines for decades, using the Mopar 4.0 that replaced the AMC 258. I called Russ Pottenger in CA, and told him what I wanted to build and he sold me the correct rods, pistons, camshaft, fuel injectors & throttle body. Russ frequents jeepstroker.com.

I did port the head using traditional methods that work in a Pontiac build. All of my head porting knowledge comes from Jim Hands book, so again, I can’t take much credit for the work I did on the head, other than I was the one getting dirty, and making a mess in my shop. I put about 20 hours into this cylinder head. I also custom built the 2.5” exhaust system. Using a Banks SS header, a 2.5” Hi flow cat, and a 2.5” Raptor muffler, and a box of tubing from E-pay.

The Jeep has always had manual brakes. The engine starts & runs excellent with a slight rumble at idle. It has immediate throttle response, immediate off idle power and pulls pretty good up to about 5000 RPM. I don’t use a tach, but it pulls hard from idle to when it sounds like it’s gonna blow up, so I’ll guess that’s at about 5000-5500 RPM.

I made an error when I listed the cam PN. It is 68-236-4 , with a 114LSA installed at 111 ICL.