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Originally Posted by MrPbody
The most prolific engine in '77 WAS 403. Generally speaking, if the scoop doesn't say "T/A 6.6", it's a 403. There MAY be variations, but I've never seen one.
Without going into great detail, if the oil filler is a pipe coming up from the front, it's an Olds. If the oil filler is a cap in the valve cover, it's a 400 Pontiac.
"Kits" for either will be difficult to get, and be "right". There always seems to be SOMETHING out of character for most non-Chevy "kits". Engine parts, however, are readily available. The Pontiac will be a bit less money for the "good" parts than the Olds. The reason is the same reason small block Chevy parts are cheaper than most... VOLUME. LOTS of 400 Pontiacs being built today. Not near as many Olds of any description.
Let us know which engine it is for sure, and we can start pointing you where you need to go. Either is "good" for making streetable power and torque. If he wants REAL power, the Olds will break his budget. The Pontiac will only fracture it...(:-
Jim
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Ok he's got the Pontiac 400 cuz the oil filler cap is on the valve cover. He wants to make good streetable power but he doesn't want to dump a pile of money into it. He'd rather just change the cam if it would make much difference. But we were told by someone that a mild cam won't help much because of the low compression ratio(around 8:1 I guess). Let me know what the best options are for him. Thanks