Long Block deal, what you think?
Thoughts? Is this worth it?
Also, I noticed that different versions of the aluminum headed LT1 had different horsepower ratings (exclusive of the LT1/LT4 diffs) and wondered why?
thanks.
The head castings that are "bad" outta the box, but the ones you want for porting are like 347, and 643, or something like that. The later castings are the thinner better flowing ones, the ones I don't a # for. I have a habit of mixing numbers up.
You do know that all F-body long blocks had Aluminum heads? and that the iron heads were only on the B/D 260hp version? but I think the heads alone can be cored for that much from some porters.
the power went from 275 - 285 with dual cats, and 285-295 with the newer heads. then 5hp came in there with the intake, witch I think was off the SS, Or "ram air" model. i think there was a 290, rating, from the not the best heads and ram air. But I'm a caprice kinda guy, so I honestly donno how the 3 varibles played out, and what did what.
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