1968 5.0 to 1991 EFI Conversion - Mustang Boards

5.0L Tech There's no replacement for displacement.

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Old 02-14-2013, 03:10 PM
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Default 1968 5.0 to 1991 EFI Conversion

Hi all -

I have a '91 GT convertible that has a beat (burns a quart o f oil every 100 miles) '80-something 5.0 in it now. I have the opportunity to pickup a '68 5.0 block.

My plan is to bore it .030 over, put in a mild cam, swap on GT40P heads, and retain the existing fuel injection and computer.

Since I'm relatively new to Fords, I have a few questions:

(1). Is this even possible?

(2). Will the EFI intake, etc. bolt on to a '68 block?

(3). Is there anything internal to the engine for the EFI that the '68 wouldn't have?

(4). Would the heads swap over cleanly?

Any help and / or advice would be greatly appreciated.

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