That is a load of baloney, a Pontiac engine will last just as long as a Chevy engine
if not longer and does
not cost twice as much to build. I have a couple of 455 engines, neither one cost a fortune to build and both have hung in there for a long time, 10 years bracket racing on one (original '74 factory lower end, untouched!) and 4 years (30K miles) street driving on the other. You can see and read a bit about both cars by clicking on my sig.
When it comes to all-out race engines the Chevy has the edge on parts pricing. But on most healthy street engines and moderate race engines the Pontiac costs nearly the same as the more popular Chevy to build.
Keep your Pontiac all Pontiac would be my advice, any decent mechanic can make a Pontiac engine run hard and last long. Chances are you bought a Pontiac because of the great styling and to be different from the rest of the Chevy crowd, prove them all wrong and go 455.
Let's go racing!
www.outlawpontiacs.com/members/B-Man2.php
www.outlawpontiacs.com/members/B-Man.php