Classic Mustangs (Tech)Technical discussions about the Mustangs of yester-year.
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This isn't on the stock bottom end, is it? I don'tknow ifthose valves would clear the factory pistons, and that cam will wind the engine up to 6k (peak power is around 5k), way past what I'd trust the stock rod bolts to.
im shooting for 400 out of my 289, but its getting all the goodies, afr heads, hyd roller cam, roller rockers, air gap intake, and everything is gonna be balanced, so it should hold together
oh, and its bored .60 over (not my choice, somebody else did that before i got the car)
Pick up a new block, .060 is way too much. SBF's use thin-wall castings, so .040 is about as far as you can take it without serious overheating issues in most cases, and I wouldn't even take it that far. 5.0 blocks are a dime a dozen, not enough to justify trying to use a .060 overbored block.
the possibility of swapping in the 302 from this granada is looming over me also but i cannot find ANY information on the horsepower ratings for the 1975-1980 with the 302 2V - some said 140 hp others said 150 - what's the deal with the power being so low? the compression? if so to get it back up swapping back the old 289 heads would raise it up correct? or is it a piston issue also. any information on that car/engine would be great as i cannot find it at all!
use the 289 rotating assembly in the 302 block, thats the best combination as the cylinder walls go down a little further in a 302 than in the 289's which equals better piston stability. plus, the 302's are a dime a dozen.
also, PLEASE upgrade your rods bolts. i cannot stress how important it is to recondition your rods and upgrade the bolts to some 5/16 arp's (drilling out for 3/8 is a bad deal). also spend the 20 bucks on a arp oil pump driveshaft.
other than that i think you'll have a great running motor as long as those heads dont fall apart on ya
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