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73-87chevytrucks.com
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'78 305 into a 92 gmc?
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Topic: '78 305 into a 92 gmc? (Read 2813 times)
jpjohnson
New Users
Posts: 1
'78 305 into a 92 gmc?
«
on:
June 09, 2011, 08:43:52 pm »
Anybody have any experience putting an early model 305 into late model pickup?
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Blazin
Blazin new trails!
Senior Member
Posts: 6130
Re: '78 305 into a 92 gmc?
«
Reply #1 on:
June 10, 2011, 05:39:25 am »
If your running manifolds you could possible have issues with the dipstick clearing them. Heater hose routing is different. If you want to run the 92 fuel system you will need to use the heads from the newer motor. Injection intake wont bolt to the early motor. Flywheel / flex plates don't interchange either.
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Some people are like Slinkies. Not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs
frotosride
Senior Member
Posts: 1428
Re: '78 305 into a 92 gmc?
«
Reply #2 on:
June 14, 2011, 10:32:56 pm »
If you have an automatic tranny you will need to find a throttle position sensor that will allow the tranny to know when to go into gear. this was fun on a '91 blazer 383 swap...also remember that the efi pump has way to high pressure to use a carb on. easy and reliable solution is keep the pump and return line, and run a regulator at appropriate psi for your carb with oe return line bleeding residual pressure from th regulator.
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"Beat it like a red-headed ford"
1987 v10 Silverado(LQ4), 87 R10,83 K20, 83 cucv 6.2 Detroit
2006 Boulevard M109R 109 cid,2019 M109R BOSS
2009 Jeep XK, (future LS Swap)
GSXR 750 engine awaiting go kart
kmcbride74
Newbie
Posts: 53
Re: '78 305 into a 92 gmc?
«
Reply #3 on:
June 20, 2011, 08:42:00 pm »
I'll bite and ask the obvious...Why would you want to do that?
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slammed79
Senior Member
Posts: 1367
Thou shalt not drive stock
Re: '78 305 into a 92 gmc?
«
Reply #4 on:
June 20, 2011, 09:11:00 pm »
Just to toss it out there, if a half smart emmissions tech notices the difference in the heads on a visual inspection, you may run into issues. Most states that have emmissions will let you swap newer into older, not the other way around.
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74 C10 Long bed 350/SM465 Lowered on 20's
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'78 305 into a 92 gmc?