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#4323302 Cylinder Heads Casting Years .............. 1985 thru 1988 Application .................. 318/140 HP ~ 2-Barrel .................................. 318/175 HP ~ 4-Barrel 'High Swirl' Combustion Chamber {Heart-Shaped design} Factory CC Level ............. 63.5 {Average} Minimum CC...

Factory Valve-Spring 'Load-Rates' 1964 thru 1967 {'Mechanical' Camshaft} 273/180 HP ~ 2-Barrel ......... #53 lbs. @ 1.69" ...... #143 lbs. @ 1.31" 1965 thru 1967 {'Mechanical' Camshaft} 273/235 HP ~ 4-Barrel ......... #83 lbs. @ 1.69" ...... #177 lbs. @ 1.31"...

~ The Kid Has No Money ~ Part 1 Building a Mid-Performance 360 'On-the-Fritz'. We're helping this youngster out, as he has 1971 Duster with a 318 that's 'shot'. We told him to save his money on the 318 Rebuild, as we will help him out. We have a 1972 '360' in a 1972 Dodge Club Cab, that...

273 Camshaft Specifications 1965 ................ 273/180 HP '2-Barrel' Type ..................... 'Mechanical' Lift ......................... .395" Intake ~ .405" Exhaust {NHRA ... .400" ~ .411"} Duration ................... 240* Intake ~ 240* Exhaust Overlap .................... 16* Intake...

~ Debunking the Aluminum Connecting-Rod Myth ~ #1 > All Connecting Rods stretch. #2 > Re-using the Rod depends entirely on the previous application. #3 > Aluminum-Rods will stretch approximately .010" more than a Steel Rod. #4 > Anybody who can analyze an Aluminum-Rod from a 'Myth' is a...

Camshaft Performance Comparison Comp-Cams 'Xtreme Energy ' XE-268H vs. Crower 'Ultra Beast' 269H ------------------------------------------------------------------------------------- Customers Car 1970 Duster 340 Curb Weight........ #3280 lbs. * Refeshed 340 Engine > Stock Factory Pistons...

What is the general overview...... On the 273, The 'Edelbrock' #LD4B ~ Dual-Plane High-Rise has always been regarded as the 'staple' for the little 273.

Mopar Performance Small Block Valve Springs 'Load-Rate' 340 'Stock' {Single-Coil w/Damper}...P/N #4120249 * 90 lbs. .... @ 1.68" {Installed Height} * 230 lbs. .. @ 1.27" {Valve Open} 340 'Extra High Performance' {Single-Coil w/Damper}...P/N #5249847 * 103 lbs. .. @ 1.68" {Installed Height} *...

Which Cylinder Head Performs Better, #2658920 {1966 and 1967 '273'} Closed-Chamber @ 57.3 CC's #2843675 {1968 '273' ~ 1968 thru 1974 '318'} Open-Chamber @ 60.6 CC's On the 'bench' both Cylinder Head Ports flow near identical. But, a true test, on a running Power-Plant...

Listed for the LM 318/240 HP Marine. Beautifully machined with open plenum area. Designed for a 318 with a Carter AFB {600 CFM}. But would work nicely with a 273 Commando. * 1968 thru 1974 * 1975 thru 1986

Looking for some recommendations from the 'Experts'..... Car.....Valiant {Approximately #2800 lbs.} * 273 bored +.040" * Flat-Top Cast Piston w/4-Valve Relief Notches * Block has been decked to 'Zero' * Compression Ratio.......{9.7-1}........'Approximate' * Cylinder Heads (1967...

Small Block Cylinder Heads CC's / Port Volume / Size / Flow 1966 - 1967 {273} Casting #2658920 Heart-Shaped Combustion Chamber Factory CC Level..........................62.0 to 65.5 CC's Recommended Minimum CC's......57.3 CC's Intake Port Gasket Size...............1.05" x 2.07"...

Anybody ever use a 1966 D-Dart Holley Carburetor for the Drag Strip. Holley #3778 - Model 4160 - 700 CFM Manual Choke - Vacuum Secondary - Single-Inlet Fuel Feed Primary Throttle........ 1 11/16" {1 5/16"" Venturi} Secondary Throttle.... 1 11/16" {1 3/8" Venturi} Primary...

Factory listed {Mopar A-Body} Valve Spring Pressure 273/180 HP * Closed...... 83 lbs. * Open...... 177 lbs. 273/235 HP * Closed...... 98 lbs. * Open....... 210 lbs. 273/275 HP 'D-Dart' * Closed..... 150 lbs. * Open....... 313 lbs. 340/275 HP * Closed....... 82 lbs. * Open........ 247...

Getting the understanding of 'Wrist-Pin Off-Sets' in Stock Mopar Pistons. Left Bank {Driver Side}...................{ 1, 3, 5, 7} Right Bank {Passenger Side}............{ 2, 4, 6, 8 }

Carter AFB 1965 '273 Commando' #3853S or #3854S = (500 CFM) Primary........1 7/16" (1.063" Venturi) Secondary....1 9/16" (1.250" Venturi) ------------------------------------------------- 1966 '273 Commando' #4119S or #4120S = (500 CFM) Primary........1 7/16" (1.063 Venturi) Secondary....1...

Stock 'Cast' Piston Weight Measurements * 273 (2-Barrel).........530 Grams * 273 'Commando'......569 Grams * 318......................592 Grams * 340......................719 Grams * 360......................584 Grams * Speed Pro 'Forged' Replacement Piston for a 340 (723 Grams)

The {273/318} Connecting Rod (#1618699) * 726 Grams The {late-318 and 340/360} Connecting Rod * 758 Grams Piston Pin (For Both Connecting Rods) * 154 Grams All 'LA Engine' Connecting Rods were 'Forged Steel' Forging Numbers * 1964-1969 {273}.........1618699 - Full-Floating * 1968-1969...

Much has been mentioned about what works best for the 273/235 HP Commando Engine Casting #2658920 Cylinder Heads. Going with a 273 Block, and bored .040 to a finished bore of 3.665" I'm asking for input from the Technical Thread. The car will used for the Drag Strip, as we are entering...