The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 5.7 liter Caddy engine swap or 5.3 Chevy engine?

Big Kev-O · 07-09-2021, 11:00 AM

I have a 5.7 L31 similar to that caddy that I scored for $650 without a transmission. It looks more period correct but a 5.3 could easily make the same power while getting better MPG. That said you would need engine mounts & harness work to get the 5.3 installed. If the 5.3 & transmission has low mileage $2k is fair. Crate engine prices have gone way up and rebuilding a big block is going to cost way more than $2k. I would go with the 5.3

07-09-2021, 11:00 AM	#9
Big Kev-O Registered User Join Date: Mar 2014 Location: Simi, CA Posts: 495	Re: 5.7 liter Caddy engine swap or 5.3 Chevy engine? I have a 5.7 L31 similar to that caddy that I scored for $650 without a transmission. It looks more period correct but a 5.3 could easily make the same power while getting better MPG. That said you would need engine mounts & harness work to get the 5.3 installed. If the 5.3 & transmission has low mileage $2k is fair. Crate engine prices have gone way up and rebuilding a big block is going to cost way more than $2k. I would go with the 5.3 __________________ Made in America by Americans