Nope, the "HD 301" blocks were leftover 303's that had been stacked in the shop, someplace.
I do wonder this: would hard-blocking a 301T block help with some of the strength issues?
Anxious to see how this one turns out. Have always regretted that Pontiac killed the traditional V-8 for the SBC in the Third Gen Firebird. The lighter V8 with the turbo woulda been a killer in that one.
Likewise, always wondered what a true 303 Turbo in the last of the Second Gen Firebirds would have been able to muster... with real Pontiac heads, a good crank and decent rods.
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