MrGoodbear

Hey guys!

So, here's the deal...

I bought my 1984 f150 302 (carbureted) last year. I'm pretty sure I threw a rod. So truck is sitting in the driveway sunbathing.

A few months go by and I see an 86 302 efi for sale for 150. The guy just needed the transmission off of it and sold the engine to me.

The engine has 76,000 miles on it. Fired up right away. Sounds great.

So can I take that 86 block and put it into my truck. Use my old carbureter and intake manifold? I'm hearing yes from a whole bunch of people and then a couple no's that scare me.

Worst case scenario, if the heads are different and something doesn't line up, I can just take the old (84) heads off and put them on the new (86) one right?

I'm so confused. Any help is much appreciated! Thank you guys! I wanna get back on the road!

SnowHam13

the only real problem I can see at this time is the fuel supply will need to be ''down graded''.
the float in the carb wont hold back the fuel at the pressure efi runs at.

other than that give her a go

Mike

MrGoodbear

Ok! Haha. Thank you Mike! I was thinking it shouldn't be much of a problem.

If nobody else sees any problems... I'm doing it!

84ordF150

You "might" have to change the distributor. When I sourced my '87 302 engine (EFI), I had to use a distributor with a slightly longer shaft. I used the '84 intake & carb as well as the '84 heads that I had already rebuilt prior to the engine swap. I went with a HEI distributor sourced from e-bay for $76.00 and it works great. If you are retaining the carb & intake, you shouldn't have any fuel pressure or delivery issues as nothing will change there. As far as your '86 heads are concerned, I'm not sure if they are the same as the 84's but should be. You will have to do a comparison once the intake is off to be sure. I do know that the blocks are the same though. Hope this helps.

MrGoodbear

Amazing! Great. Thank you so much. You guys have been very helpful. I'm glad to hear my baby can get back on the road.

84ordF150

If you want to retain the original ignition, (assuming it is the DuraSpark) there are distributors out there but, they are a little pricey.

http://performancedistributors.com/p...-distributors/

MrGoodbear

yeah they are! sheesh! good to know. i think i'll break open the piggy bank now. haha.

84ordF150

You can go the HEI route and leave all of the DS ignition intact and revert back to it later.
My DS ignition is still in my truck. If you do decide to go the HEI way, follow the instructions as the HEI requires 12v. If you need a link for the HEI distributor, give me a shout.

MrGoodbear

ok! will do for sure! once i get there, i'll hit you up. thank you!

84ordF150

Your welcome...I took "time line" photos of the head & engine rebuilds as well as pics of junk yard engines before and after I yanked parts from them for reference purposes. I'll forward them if needed