302 heads
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Junior User
Joined: Dec 2002
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From: Western IL
302 heads
I've got a set of '71 heads, still on the motor. The crank is junk, its scored really bad and I don't want to spend a ton on machine work. I'm thinking about using a '78 block, and putting the '71 heads on it. Will I have any problems, and are these going to be good heads to clean up the ports in?
Thanks,
78ford100
Thanks,
78ford100
New User
Joined: Dec 2002
Posts: 13
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From: Sheboygan USA
302 heads
[updated:LAST EDITED ON 01-14-03 AT 00:29 AM (EST)]Probably going to need new valves, seats, and seals. 71 is the first of the smog moters, not exactly sure if they were still running leaded gas. When they started using unleaded gas, they had to switch to harder metals to keep the valve seats from eroding. Other than that, they'll work. If you're going to do any kind porting, even just cleaning up the casting flash, and/or matching the ports, it pays to do something with the exaust at least. The stock manifolds are really restrictive.
I just had an oil pump go out on a '78 302, and the bottom end got trashed, but I kept it anyway. Was a pretty strong motor, but my boss calls them the engines with the wooden cranks. I put a 500cfm Holley 2bbl, got rid of the egr and got a 1' spacer. With 1 5/8 longtube headers with dual exaust, it made the f100 it was in pretty fast, and it made an even better hauling truck.
'85 F150, low 1st 4spd,
B&B 5.0, P&P stock heads, Crane roller cam, Edelbrock RPM intake w/1'spacer, Holley 600,
dual exhaust w/ crossover, H/D radiator w/ electric fan
I just had an oil pump go out on a '78 302, and the bottom end got trashed, but I kept it anyway. Was a pretty strong motor, but my boss calls them the engines with the wooden cranks. I put a 500cfm Holley 2bbl, got rid of the egr and got a 1' spacer. With 1 5/8 longtube headers with dual exaust, it made the f100 it was in pretty fast, and it made an even better hauling truck.
'85 F150, low 1st 4spd,
B&B 5.0, P&P stock heads, Crane roller cam, Edelbrock RPM intake w/1'spacer, Holley 600,
dual exhaust w/ crossover, H/D radiator w/ electric fan
Senior User
Joined: Jun 2002
Posts: 423
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From: Oklahoma
302 heads
It wouldn't really pay to invest a whole lot of time and money into these heads if you are looking for performance as there are better options out there; but for a budget setup you can install 351W valves, clean up the bowl areas, remove the Thermactor bump and match the port openings to FelPro #1250 and #1415 gaskets and have a decent set of street heads.
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rodriguezfords
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78ford100
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