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Old 10-10-2012, 10:33 AM
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bigdog7373 bigdog7373 is offline
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Lsx swap worth it?

I currently have a 350 sbc in my 78 firebird but i'm seriously thinking about an lsx swap. The 5.3 motor. The car is getting restored and converted to a trans am, and i would hate to finish it and not be happy with it. It currently has a 350 backed by a th350 trans. It makes an honest 290hp, probably more. The thing is that it's going to be my daily driver and the gas mileage is terrible. I was also planning on doing some upgrades to the small block but when i priced it out i can do the ls swap for about the same price. My other thinking is that even if i do leave the sbc as it is vs doing the ls swap, i'd end up spending more on the 350 because of the fuel mileage. So i guess the ls would pay for itself in only a few months.

One thing i'm wondering is that i just picked up a muncie 4 speed and i'm pretty set on using it. Can i use it with the 5.3 ls?

People who have done the swap: What are the pros and con s(if any) that you have come across after the swap? Is the fuel mileage a big difference? How much did it end up costing you?

I guess I've kind of convinced myself that it would be good to do, but i just don't know if i want to do all that work and money.

Any opinions or experience would be really awesome.
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