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350 V8 Conversion 240Z


Guest jared240z

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Guest jared240z

ok, i know u guys prob hear this a lot but im tired of scanning through the endless search results. i want to put a chevy small block v8 in my 1972 datsun 240z. ive never done an engine swap so tell me what im getting into and what the easiest way to do it would be. and what kit would be best to use. ive been reading the jtr website and it sounds pretty legit. and if i hunt around local salvage yards and places how much do u think is a reasonable price for a chevy small block v8?

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LOL.... These three posts sound like the dialogue you would hear between Hugh Hefner and a young man discussing using Playboy to help him get his first good lay....:-)

 

 

LARRY

 

 

:lmao: :lmao: :lmao:

 

How much for a decent engine? Well, depends on what you want. I've got a 509" BBC 13:1's roller motor with 345cc merlin heads for $4500. Of course that'd probably put the z into the 8's, maybe too much for you right now.

 

Or is it ever "Too much"????

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posted by Cozy

 

These three posts sound like the dialogue you would hear between Hugh Hefner and a young man discussing using Playboy to help him get his first good lay....

 

......

 

You mean I can't get my first good lay by reading Playboy??????

 

 

 

 

 

Dammit.

 

jt

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The swap is easy if you know your way around cars, if you have the tools and a suitable environment to work, if you have the time to do the job, and if you stick to a reasonable plan.

 

Otherwise the swap won't be easy.

 

A '72 Z and a carbureted 350 V8 are about the easiest choice for a swap. In fact the biggest challenges may not be in the swap itself, but getting the engine to run right - the usual stuff in any hotrod project.

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You've got a lot to learn, but there's a lot of help if you approach it right. Take your time and get information from as many sources as possible. Figure out what power level you're after, carberated or EFI, auto trans or manual, and set a realistic budget. Then make sure you have other transportation while the Z is down for the swap for a few months.

 

Next step after determining what you want, is to try to find that whole combination in a running vehicle, and buy it, drive it, and make sure it's solid before swapping it into the Z. Then if you have some problems downstream, you know there's light at the end of the tunnel, rather than chasing an unknown set of problems indefinitely.

 

Also, with more power comes other considerations like upgraded brakes, springs, sway bars, maybe a rollbar and better belts/harness, wheels, tires, and the list goes on...

 

The good news is you're not alone. I only found this forum a few months ago, and I have found many useful threads and a lot of people willing to help. I've been building Chevy powered muscle cars and street rods for years, and I'm now starting my first 280Z V8 conversion with my son. This one is for him, and to move us up the learning curve, so I can tackle an LS1 T56 conversion on my 240Z later.

 

I did my research, bought the donor vehicle (a '90 Firebird 350 TPI and WC T5 5-speed in my case) now I'm reading everything I can about the electrical requirements from this forum, JTR, the GM Helm manual, and the Diamond Pubs Z manual before I turn the first wrench. When I know what I'm doing, I'll pull the engine/trans/wiring, and start the prep on them before I touch the Z. Only then will I take the Z out of service and prep it for the swap. I'm also hitting the salvage yards and parts stores for the bits and pieces recommended by the JTR books so I'll have everything ready at once.

 

I've found solid answers to very obscure questions on this site, but it takes a bit of patience and a lot of reading to get there. I hope that helps you get started

Steve.

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