There's a good reason for many "Day Two" modifications.....

I hear it every day-some "Just as it left the factory" type makes an incredible barn find of a low-mileage musclecar and then bitches because it has a couple of non-stock parts-i.e. a Mallory distributor or a Holley carb or something else that was a popular mod back in the day. Besides enthusiasts looking for more speed, there was a lot of factory parts that just didn't work from the get go. Here's the major ones. # 1. Shifters. Pontiac GTOs and Firebirds and Olds 442s with 4-speeds had Hurst shifters from the factory, which worked great even when powershifting. However-for some insane reason Chevrolet SS 396 Chevelles and Impalas and even small and big-block Camaros and Novas used a horrible body-mounted Muncie linkage. Forget powershifting-if you were over 3,000 rpm and had your foot in it-the linkage would bind up. You couldn't shift them quickly under any circumstances. So most people did the smart thing and went to their local speed shop and bought a Hurst or Mr Gasket shifter and solved the problem. This wasn't just a Chevy problem. Fords and Chryslers had terrible shifters. In 1970-the new Hurst-"Pistol Grip" shifter that showed up in Mopars was a vast improvement-but it still wasn't great. Ask anyone who tried to powershift a pre-1970 Mopar and they'll tell you horror stories of missed shifts and being stuck between gears. Ditto for Fords. Yes, the Boss 302 had a Hurst linkage-but the 70,000 other V8 Mach 1 Mustangs had a terrible Inland linkage. Even in the disco-era the Pontiac Trans-Am had a Hurst shifter from the factory and the Z/28 Camaro had a crappy Inland shifter.  So that's why you rarely see a stock shifter in anything other than a Pontiac- in most musclecars-they were replaced with a Hurst 40 or 50 years ago!!  # 2. Distributors. GM had decent distributors. If you used genuine Delco or Accel points they were good to 6,000 rpm or so. Not so with Fords and Mopars. Their points would "sign off" about 5,000 rpm. If they weren't set perfectly, they'd start to "bounce" as low as 4,400 rpm. You never saw a Ford or Mopar drag racer who didn't have extra sets of points in his toolbox!! A lot of guys switched to aftermarket Accel or Mallory units. They did it because the stock ones just flat didn't work. There's a reason everyone rejoiced when Chrysler went to electronic ignition in 1972 and GM and Ford in '75!!  # 3. Carburators. This is what hurt Ford the most. The Autolite 4100 and 4300 4bbls are THE WORST carbs ever built, bar none. They were terrible when they were brand-new. Cold-starting problems, crappy gas mileage, no power. My dad was a carburator specialist in the '60s and '70's for both GM and Ford. If you had a new Ford in the early '70's and you bitched hard enough-Ford would have their dealers replace them with a 600 cfm Holley with a electric choke and warranty it!! If I remember correctly the carb number was either 6619 or 6919. My dad installed hundreds of them-even on 429 and 460 powered T-Birds and Lincoln MKIV's!!  But most gearheads that had Torinos, Mustangs, and Cougars didn't know that-and they just replaced them with a Holley or a Carter AFB. The Carter AVS that came on most Chrysler products worked pretty good, but they only flowed about 585 cfm. Fine for a little 273 small-block, but kind of choked off the big 383 and 440 engines. So a lot of guys switched to big Holleys. The 750 cfm Carter Thermo-Quads that Chrysler went to after 1970 was ok when they were brand-new, but the bakelite bodies would warp from engine heat and start bleeding over and running like crap. GM Quadrajets fared a little better brand-new-but for some insane reason a lot of these had plastic floats. Gasoline is corrosive to plastic, so the floats would get heavy and sink and the cars would run like crap. Tuners like my dad and Brad Urban and Nunzi Romano would rebuild them and use brass floats and jet them properly for performance use, but again-most gear heads just junked them. And in a lot of cases-they changed the manifold too. The reason being-the Carter AFB and all Holleys had a square bore bolt pattern that wasn't compatible with Q-jet or Thermo-Quad spread-bore manifolds. Some guys used adapters-but that never really worked well-so most of the time guys changed the carb and intake. Edelbrock and Offenhauser made a mint because of this. Then in 1971-Holley came out with a line of carbs that had the spread-bore bolt pattern. You could now put a Holley on your car without changing the manifold. And a lot of guys did. # 4. Exhaust. All musclecars had restrictive exhaust systems. Some-like the stupid "Crossflow" muffler in '70's Camaros and Firebirds and Corvettes-really killed performance. Even if you didn't have headers-going to an aftermarket dual exhaust system could add 40 hp with stock exhaust manifolds. It was too much of an easy boost for most people to resist. Who wouldn't want more hp, better gas mileage and a throatier sound?  # 5 Wheels and Tires. Really?? Is there anyone wondering about this one?? You'd really try to make a 454 Chevelle or a 440 'Cuda or a 428 Mustang try to hook up on F70-14 Goodyear Polyglas GTs or Firestone Wide Ovals??  Or even a 400 Firebird or 396 Chevelle or a 340 Duster for Pete's sake!!  Anything with any power at all built in the '60's and '70's needed more rubber on the road!!  That's how M&H and Mickey Thompson and Pro-Trac flourished selling big tires. B.F. Goodrich burst onto the scene with the Radial T/A-one of the first wide performance tires of radial design. Hope that clears things up on "Day 2" mods.....Mastermind