4. The heat riser is blocked off, a special (thin) head gasket from the Super-Duty 421 engine is installed and still more compression is gained by installing Champion J-I0Y plugs without gaskets. 5. Finally, special fiber-insert rocker arm retaining locknuts are installed which permit the...
the Pontiac 389 received a fair number of updates and changes over the years. While the overall 389-cid V8 stayed the same at its most fundamental level, changes to the engine’s induction system, cooling system, camshaft, and material led to a wide array of different 389 specs between 195...
a gasket to block the heat riser of the carburetor (keeping it cooler), larger carburetor jets, high-capacity oil pump, and fiberglass shims with lock nuts to hold the hydraulic valve lifters at their maximum point of adjustment, allowing the engine to rev higher without "floating" the valve...
it was down to 200 net horsepower (149 kW), respectable for the time, but almost shameful for such an enormous engine. When the 455 was gone, the top option was the 400, which now had only 180 net horsepower (134 kW) and 325 lb-ft (439 N-m) of torque). That was up to 200 ...
t done the interior of the Pontiac any harm. The carpet has been removed, but this gives us a chance to see just how clean the floors are. The remaining interior trim actually looks to be quite good, so it looks like a new carpet set and a good clean could have the interior looking...
testers found it more enjoyable to drive. Once the MR2 went on sale, Fiero sales dipped to 76,371. That was still better than either the MR2 or CRX and about as good as Datsun’s populartwo-seat Z carhad done in its best years, but it set off alarm bells in GM’s executive ...