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In the 1974 NASCAR chevys ran the 427,not the 454. I'd ike to if anyone knows what came with a 427 in '73 or '74. A motor used in a NASCAR had be a prodcion motor, right?
Necoa #: 11368
Location: 7(AL,GA,TN)
Joined: Mar 25, 2008
Posts: 56
Year: 1983
Model: El Camino
Posted: Thu
Jul 24, 2008 9:00
pm Post subject:
The 427 wasnt used in anything after 1969, except the tall deck blocks used in 1.5 ton trucks and up. They would have been 454 in 1974 unless they got some permission from NASCAR.
Necoa #: 572
Location: 10(IL,MN,WI)
Joined: Jan 28, 2003
Posts: 3483
Year: 1984
Model: El Camino
Posted: Tue
Jul 29, 2008 3:50
pm Post subject:
Gen IV motors (396/427/454) are all the same in design, only varying in bore and stroke. NASCAR undoubtably had a cubic inch limitation on cubic inch size of 427 cubes back then...which means that that Torino next to that Monte in the pic was most likely also running a Ford 427 inch motor. The 454 Gen IV was first produced in 1970 at the height of the muscle car era and was more of a who could produce the biggest cubes to increase sales...until the EPA and insurance companys said enough is enough. The 454 cubic inch motor would have had too long of a stoke for NASCAR racing. That doesn't mean that a 454 block wasn't used, it means that it was destroked to meet NASCARs limit on cubic inches. Of course I was like 17-20 years old back then...what did I know (we were NHRA fans, we only watched NASCAR for the crashes)...now I'm just a feable minded senile old fart...what do I know? I had a 68 440 Road Runner back then that got about 14 mpg, my buddy had a 70 SS 454 Chevelle LS6 4 speed that got about 8 mpg, that could pull the front wheels off the ground in 1st and 2nd...gas was about $1.19 a gallon (Sunoco 260 105 Octane)...what did we care...we thought that the guy running a 57 Chevy 427 dual quad tunnel ram and gettin 2 mpg was the nut in the neighborhood, after all gas WAS $1.19 a gallon! Ahhhh those were fun times!!! After blowin up the 440 and installing a new 440...I wrecked the Road Runner and bought a 75 Monte Carlo Landau...the fun times were over!
Necoa #: 572
Location: 10(IL,MN,WI)
Joined: Jan 28, 2003
Posts: 3483
Year: 1984
Model: El Camino
Posted: Tue
Jul 29, 2008 9:26
pm Post subject:
454s are much more readily available and a bit cheaper to build/rebuild. Useable 427 blocks have been snatched up over the years by people doing numbers matching restorations. GM still makes Gen IV 454 blocks, they quit making Gen IV 427 blocks years ago.
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After blowin up the 440 and installing a new 440...I wrecked the Road Runner and bought a 75 Monte Carlo Landau...the fun times were over! 
