The 48's are a dime a dozen!
The RA IV were a couple thousand dollars!
The SD 455's were basically unobtainable!
The reason is as said, when the aluminum heads came out, no sense in trying to go fast with cast iron round ports. They went to high dollar restored cars.
This isn't to say there were none, because there were racers using the round ports. (like Beswick and others?)
Class racers used them but not power adder.
__________________
John Wallace - johnta1
Pontiac Power RULES !!!
www.wallaceracing.com
Winner of Top Class at Pontiac Nationals, 2004 Cordova
Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats
KRE's MR-1 - 1st 5 second Pontiac block ever!
W.E.C moment
"Every man has a right to his own opinion, but no man has a right to be wrong in his facts."
"People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates