1970 BUICK Skylark Street Sleeper

1970 Buick Skylark Additional Info:

This 1970 Buick Skylark 350 coupe was acquired by the seller in 2013 and subsequently modified for drag racing with a 462ci V8, a Midwest Muncie M23 four-speed manual transmission, and a Quick Performance 9” rear axle with a Yukon locker. Additional modifications include a nitrous-oxide injection system, an electronic ignition system, a ProForm 950cfm carburetor, a front brake line locker, a Lakewood Blowproof bell housing, a driveshaft safety loop, adjustable front coilovers, Global West front control arms, and UMI Performance adjustable rear control arms. This modified Skylark coupe is now offered with a spare set of 15″ Cragar wheels with Mickey Thompson tires as well as build documentation, a workshop manual, a spare nitrous-oxide tank, an uninstalled tow hitch, and a Washington State title in the seller’s name.

The car left the factory in Gulfstream Blue (25) and is said to have been repainted in the mid-1980s. Features include a hood scoop, body-color side mirrors, and chrome bumpers. The body was removed from the chassis during the aforementioned build, and areas of rust, discoloration, and peeling paint are shown up close in the gallery.

Decoding the Fisher cowl tag reveals the following production information:

Style 70-43537 – 1970 Skylark 350 two-door coupe

BF – Framingham, Massachusetts assembly plant

Trim 121 – Blue interior

Paint 25 – Gulfstream Blue paint

B80 – Chrome drip rail molding

10D – Built the fourth week of October, 1969

Barn stored from 1999 – 2013. Body-Off Re-build & Drag Race Prep between March 2013 – June 2016, continued upgrades since. Manufactured 10/69, Farmingham, MS. Plant. Non A/C, clock, rear defog, map light, trunk light, only factory options. Gulfstream Blue exterior GM 25 (repainted est. 1986).

Original Two Tone Blue door & kick panels, sail panels and headliner. New carpet, metal dash refinished, rebuilt front bench and rear bench with new PUI seat covers.
Engine is a 1972 BUICK 455, Bore 4.3425” x Stroke 3.9”= 462” Cubic Inches Displacement. 550 Ft/lbs. Torque / 500 Horse Power, [Naturally Aspirated] @ Engine Dyno. Balanced rotating assembly, deck set -0.020”, TRW Forged Aluminum Pistons, peened and resized Con Rods, Blueprinted Oil Pump, Race bearings, ARP Fasteners. 9.65:1 Final DCR.
T/A Stage 1 Aluminum Street Eliminator heads, 2.125” x 1.75” Stainless swirl valves, Full Race Ported, flow 340 Intake / 240 Exhaust, 60 cc. Port Matched Edelbrock Performer aluminum Intake manifold, center plenum cut out and blended. AMP baffle installed. Cometics 0.019" head gaskets.
Bullet 228*/0.520” x 233*/0.525”, 112LSA / 108* CL, Hydraulic Johnson Lifters. T/A Roller Rockers 1.6:1 & 3/8” Chrome Moly pushrods
Doug’s 1-7/8” x 3” Jet Hot Coated Headers, Torque Tec 2-1/2” w/ x pipe crossover tubes factory style tail pipes, Walker Dynomax 20” mufflers. Crankcase evacuation system plumbed into head pipes.
Proform 950 Carburetor, 0.080” primary & 0.086” secondary jet, 33/79 Primary & 35/79 Secondary Squirters / Air Horns, 2" Wilson tapered carb spacer manifold base plate.
NOS Kenne-Bell Tall Valve Covers, T/A [reproduction] Kenne-Bell Stage 2 Hood Scoop, K&N Hi-Flow Air Filter.
RobbMc 1100 Race Fuel pump & fuel pressure regulator, -8AN fuel tank pickup & fuel lines, RobbMc 100Micron & 80Micron filters.
Nitrous Supply Inc, ” Sports Star plate, 0.047" N20 and 0.043" Fuel jets, 6.5 psi fuel switch, carb mounted WOT switch, NEX Bottle Heater, push button system purge, pressure blow-off valves, set for 100 HP shot. Dedicated Fuel System, RCI 1 gallon dedicated fuel tank, Comp Cams 45PGH fuel pump, Edelbrock fuel pressure regulator, RobbMc 100Micron & 80Micron filters.
Mallory fully programmable HyFire IV Digital Timing control Box, MSD Starter Saver, MSD 8517 Pro Billet Distributor, locked out 36* timing, MSD 8.5mm Super Conductor plug wires, MSD Blaster 3 Coil.
Quick Performance GM 9”, Fabricated Steel Center Section, ” heavy walled axle tube, aluminum through bolt center section with 35 spline axles, Yukon locker, 1350 series billet yoke and dif U-joints, Aluminum Daytona pinion support & 3.70 ratio ring & pinion. 3”/20 axle studs.
Rear Speedway 15 x 8 GM Steel Wheels w/ Dog Dish Hub Caps – 275/60/15 Mickey Thompson Drag Radial. Front OEM 1970 GM 15x7 Steel Wheels w/ Dog Dish Hub Caps - 245/60/15 BF Goodrich Radial T/A. Race Slicks are Mickey Thompson Drag ET - 29x9x15, tubed and screwed and 25/4.4/15 mounted to vintage Cragar Super Tricks.
Race Prepped Mid-West Muncie_ Auto Gear M-23. 2.99-1.88-1.35-1:1. 1.5” main shaft, steel midplate, Wilwood Hydraulic Clutch Pedal with American Powertain Hydramax throwout bearing. SFI Certified Lakewood Blow Proof Bell Housing /steel block plate, SFI Billet Fly Wheel, SFI McLeod RST Twin Disc Clutch. Vintage Mr. Gasket Vertigate inline 4 Speed Shifter ( NOS unit, installed 12/23/24 and driven 50 miles ) Hurst Roll Control “Line-Loc”.
Scaled weight with 205 lb driver = 1840lbs front / 1760lbs rear / 3490lbs curb total, and balance is 51.8% front / 48.2% rear.
Global West Upper and Lower Front Control Arms, QA1 double adjustable coil over shocks, 1.25" front sway bar (removed).
RedHead Steering Gear restored 1970 Manual steering box.
UMI Adjustable Upper and Lower rear control arms, Flaming River double adjustable rear shocks, MOOG 5401 rear shocks, HRParts-N-Stuff Rear Bar. Driveline NW, 3.5” Heavy wall Drive shaft. Coruso Ind. Driveshaft Safety Loop.
Taylor Battery trunk relocate Box, Moroso Battery Disconnect switch, 0.0 GA Wire. Power master heavy-duty starter and single wire 150 amp alternator.
Heavy Duty 4 core radiator, 7 Blade Thermostatic Clutch Fan, Custom aluminum coolant over flow catch can.
Autometer Sport Comp Oil Pressure Water Temperature, Vacuum and Fuel Pressure Gauges for carb supply and nitrous fuel system supply. Autometer digital programble tachometer with shift light. Oil pressure and water temperature indicator Pro-Lights. BUICK Factory in dash tach with Autometer circuitry, AEM Air Fuel Ratio Exhaust sensor and Gauge.

On Mar-30-26 at 21:15:05 PDT, seller added the following information:

The car ran ten 1/4 mile passes at 115-117 mph, 12.12 best, naturally aspirated, but the gearing of the trans @ 2.20 first gear killed the 60 foot time. I sent back the trans to Midwest Muncie and Jeff changed gearing to the 2.99 first that with the 3.7 rear gear is the business. Easy 11’s naturally aspirated. Please know that the Nitrous system was never introduced to the drive train. I wanted to dial in the car the chassis tune the car N/A first then chasis tune on the Dyno to dial in the nitrous. Never got there as our life plans have changed. Mahalo.