[TransAm 474]

Another Update here guys.... we got it together, installed, and broken in now! Everything seems to be going great so far, atleast in the shop, we haven't driven it yet. We had SMI do the 800cfm qjet for it, and Cliff recurve the distributor.

Just a little refresh of the build,

1979 Trans Am
Numbers matching W72 PWH 400
Butler 467 stroker kit
4.181" Bore
Eagle 4.250" Crank
Eagle 6.800" H-Beam rods
Ross Flat Top 8cc 2VR
Total Seal Classic rings
Melling M54DS pump with .062" shim added in cap
Zero Decked
.039" quench using 1016 Felpro head gaskets
Stock(unported) 6X4 heads with 96cc chamber
Ferrea valves, Crower 68404 spring set up at 1.550" I.H.
9.37-1 compression
Stock iron Intake
SMI 800cfm Quadrajet 76 Jet/46K Pri Rods, DA Sec Rods
Lunati VooDoo 704 Camshaft
281/289@.006" Advertised Duration
233/241 Dur@.050"
.504"/.527" Lift
110° Lobe Separation
Installed at 103° Intake Centerline
Crower Cam Saver Lifters
Factory stamped rockers with 7/16" studs and poly locks
Butler 9.200" .116" Wall Pushrods
Hooker 1 3/4" Super Comp headers
Factory distributor recurved by Cliff Ruggles
Powermaster XS 9510 Starter
Super T-10 4-Speed manual transmission
3.23 gears

Timing is set at 14° Initial and has 30° at 3200 RPM, Cliff said it will probably gain another couple degrees beyond 3200, so he recommended leaving it there for now. We are at about 1100 ft. Elevation, and the engine makes right at 14" of vacuum at 840 Idle RPM. It has a little racy rumble, but it's really fairly mild, in fact, more mild than I expected, but should work great for a street car. The car seems to fire off immediately. It has an electric choke, so give it a couple good pumps and it fires at the hit of the key, and gets right up to fast idle until it warms. Hot starts are immediate as well. Throttle response seems to be fantastic so far, I have the mixture screws at 2.5 turns out, which is where Sean Murphy at SMI already had them set by default, and it seems to like that best. I'll report back with a performance update after it is driven to see how it runs.