hi, i am building a 347 stroker motor. my buddy wants to sell me dooe heads out off a 72 351 for 80 bucks. i was woundering if it is worth it to buy them cause i dont have the money for new ones. would i get better performance out of them than some aftermaket heads. also can you guys ballpark how much hp i would be around with 347, performer rpm air-gap, 750 cfm carb and and an agressive cam
thank you, mike

 

if you have a 87 through 95 stock mustang heads just hang on to them for a little while and save your money for a good set of heads if you have a pre 87 motor or a non mutang motor go ahead and buy the 351 heads. but either way save up your money and get a good set of flowing heads for that thing.

 

for $80 that is a good deal. but your gonna have to spend some money on port work, valve job and hardened valve seats.

those are not from a '72 if they are dooe's those are '69-'70 heads and basically are gt40 iron heads. i'm pretty sure the '72 heads sucked, only the '69-'70 but i could be wrong (i don't think i am though)

when it's all said and done, you'll have a nice set of heads, but will have spent about $600 total

 

thanks for the info, the heads a dooe's it is probly is older than what he said he was parting the engine out.

 

average price for those heads are about $100 so it's no stellar deal.

but just to give you an idea.

 

The '72 do really suck.......
I've sold 2 sets of C9's in the past 3-4 years and I get $100 a set for them.
They really don't make a bad head to use if you are 'bucks down'. Do a real careful bowl blending job along with matching the ports.
They seem to really like 1.94 valves too...........
I was using some like this on a 351 in a '67 'stang coupe, smallish hyd cam (comps), 10 compression, 4.10 gear and running 11.95 or so up here in the desert...........

 

thank you for your info, im probly going to clean them up and just use them while i save up for aftermarket heads. i dont have the stock heads because i bought a bare block. i also have another question i live in mass so im just woundering will the 347 with an f or x 303 cam pass emisions without any trouble? thanks mike