Help engine swap for 75 datsun 620

1972-1979 Datsun 620 forums. All 620-specific topics and discussion can be found here.
VanishedSpark21
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Joined: Mon Feb 23, 2015 8:51 am
Car: 1975 Datsun 620
what engines can fit in it

Help engine swap for 75 datsun 620

Postby VanishedSpark21 » Mon Feb 23, 2015 9:14 am

I bought a 1975 Datsun 620 pickup it runs and drives but I want to put a different engine in it and I don't know what will work or even fit in it I really need some help


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themadscientist
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Re: Help engine swap for 75 datsun 620

Postby themadscientist » Mon Feb 23, 2015 6:24 pm

If it has the L in it you don't need to swap anything. The L is a bad sumbitch!
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https://www.youtube.com/watch?v=wMutdcK9RgQ

VanishedSpark21
Posts: 6
Joined: Mon Feb 23, 2015 8:51 am
Car: 1975 Datsun 620
what engines can fit in it

Re: Help engine swap for 75 datsun 620

Postby VanishedSpark21 » Mon Feb 23, 2015 8:05 pm

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this is whats in it

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NL320what
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Re: Help engine swap for 75 datsun 620

Postby NL320what » Fri May 29, 2015 2:07 pm

It really depends on what you want to do with the truck, fabricating experience, tools, time, and money.

1975 was the first year the 620 had the L20B, which is a good all around motor, dont like to rev very high but it has good torque.

Since you brought up motor swap, lets talk about that some. There are motors that will bolt in directly without much work.

The last year of the 620 was 1979, 1980 was the 720 model but used the L20B for the last time. Then they went to a Z22 and Z24 engine, which is bigger.

The later Nissan hardbody trucks came with a KA24E engine and also bolts into the same spot, with a few changes.

Those are if you want to stick with Nissan bolt in parts, otherwise you could always drop in a 5.0 or chevy V8, requires alot of drivetrain fabrication.

I had a 74 640 with a 86 Mustang 5.0HO motor, C4 auto, 8.8 rear end swap, and custom driveline with adapted brake lines.

Worked great, did a 12sec quarter mile.

CPHT_818
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Re: Help engine swap for 75 datsun 620

Postby CPHT_818 » Sat Jan 30, 2016 10:51 pm

Do you know what the few changes that need to be made when installing the KA24E

CPHT_818
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Re: Help engine swap for 75 datsun 620

Postby CPHT_818 » Tue Mar 15, 2016 7:38 pm

I have a 89' MX-6 motor does anyone know if that will swap into a 620 pick up

Old Rob
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Location: Orange County, CA

Re: Help engine swap for 75 datsun 620

Postby Old Rob » Sat Oct 15, 2016 8:57 pm

You DO NOT have to cut the firewall for a SBC V8. Some hammering will need to be done, This retains the structural integrity of the cab. SBC 4.3L V6 needs very little firewall work. Radiator is in stock location. Vehicle balance is kept. I've done or helped do thousands of these since 1972. You can use TH350, 700R4, early 4L60, 4 speed, t5 five speed. For more information www.powerbyace.com Technical and catalog sections.


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