HOME         CATALOGUE          TECH INFO          SHOW YOUR RIDE         CALCULATORS          ABOUT US         GALLERY        CONTACT US

Preston Larson's 1970 Formula 400
(In His own Words)

This is my (restored by me) Admiralty Blue 70 Formula 400, powered by a 72 455/463 with original T-400 transmission, Jim Hand converter and original 12-bolt rear with 3.42 gears, Eaton posi and Moser axles. The original #'s matching YS code 400 is tucked away for safe keeping. The engine sports a pair of Dave's 295cfm KRE heads, cnc'd iron intake and a Ruggles built 800cfm q-jet. The cam is SD's Old Faithful 236/245/112 using Scorpion 1.6 rockers. The exhaust leaves through a set of 1 3/4" Hooker Super Comps with a Pypes 3" x-pipe system. This sweet Firebird has never been to the track but is extremely lively!!! It is also a very nice mannered street machine. Thanks to Dave for all of his expert workmanship and advice!!!


News & Events

What's been going on at SD
We've made some changes over the last year or so. After a bunch of evaluation we came to the conclusion more >>
Spring 2013 is here!!!
Things are back on track in the shop and we're glad to see the economy seems to be picking up over spring more >>
What's been going on at SD
We'll to say things have been challanging since the landslide that took out our old shop in 09 would more >>



Engine Specs.
72 455 block +.035, 4.21 stroke.
Pistons: Ross forged with -20cc dish. I originally built it with iron heads.
Scat h-beam rods. Stock length. Balanced.
Melling 60psi oil pump. 3/4 length windage tray.

Heads: KRE 72cc d-ports 295cfm by Dave.
.040" Cometic MLS gaskets.
Compression ratio 10.5 to 1.

Intake: Iron intake with plenum and runners cnc'd by Dave.
800 cfm q-jet by Cliff Ruggles.

Cam: Old Faithful 236/245/112 with Scorpion 1.6 roller rockers.

Ignition: MSD ready to run distributor with MSD 6-AL. 30* total timing.