both good engines but i have 65 elcamio with a 454 and it is just the best engine i have ever put into a chev. i would go with a 454
If the only thing wrong with the engine is the cylinder heads, yes you should replace just them, Getting a rebuilt motor is expensive and not needed unless the motor has been damaged beyond repair.
The timing chain will normally last the life of the engine and is replaced when the engine is rebuilt.
Replace the Mazda engine.
Depends on care and maintenance.
Depends on care and maintenance.
If one is interested in buying a rebuilt engine, there are many questions the buyer should ask. To be more specific, they should ask their qualifications, how they did it and the parts that were used.
The four cylinder Fiero engine has a bad problem with cracking the cylinder head. If the gasket is bad it is likely the head will need an expensive repair. If the car has the V6 engine it is possible to just replace the gasket The real question is how good was the engine before the gasket failed? Should it be rebuilt or was it not burning oil and in good condition before the failure. Did the gasket failure cause any damage to the engine?
Timing chains should last the life of the engine and are normally replaced when the engine is rebuilt.
Timing chains normally last the life of the engine and are replaced when the engine is rebuilt.
The timing chain should last the life of the engine and not maintenance is normally required. It is replaced when the engine is rebuilt.
you should be able to get to it from the passenger side of the engine compartment as it's right on the firewall.
10w30