I imagine there are quite a few guys here that like me, enjoy seeing what others have used and done with their engine builds. It can often come in helpful when planning a new engine build. So I thought I would start this thread as a place to post your 400/406 engine build specs and any performance info you might have.
I'll start off with an engine we built for my son several years ago.
We started off in one direction and ended up on a little tangent. What we started with was a completely stock rebuilt 400 shortblock, which was bored .020. We topped that with a new set of Vortec 062 castings that were machined for screwin studs and guide plates. They were also machined for Comp 981 springs and the retainer to seal clearance checked. We ran Crane Gold 1.5 roller rockers with a Comp X4262 cam which has a lift of .462 intake and .480 exhaust and a .050 duration of 218 and 226. This is the cam here:
http://www.summitracing.com/parts/cc...39-3/overview/
For an intake we went with a Edelbrock Performer RPM, topped with a Holley 3310/750cfm vac secondary. For the ignition a Pertronics HEI was used.
This engine was installed in a '79 GMC K15, backed with a SM465, NP203 12 bolt rear and Dana44 front. The only performance info from this installation is that it had enough torque to break the center section of the 12 bolt from the axle tubes and spin it almost 90 degrees. This truck was later totaled in an offroad incident and this engine found a new home in a '85 IROC. It was backed with a TCI TH350, 3000 stall, a detroit locked 9" and 3.73 gears. With a set of sticky 28 x 10 slicks it would knock down 12.4-12.5 quarters on the engine and 11.5 with a shot or N2O. IMO that was pretty dang good considering how mild this engine was built.
OK guys post up your 400/406 builds