exhaust manifolds on a 5.3?

[oteixeira]

So I put the engine in my 70 C-20 project today. The engine is a 2005 5.3 from a Silverado. I was able to squeeze the drivers side manifold back on but it looks like the only way to run the passenger side is to notch the frame. Is that what you did, or is there a source for a good set of not $500 headers that fit this install?

Thanks,

Orlando

[Hart_Rod]

What engine mounts did you use? A set of 98 Fbody manifolds work extremely well with the ECE brackets. Or you could buy a set of Dough Thorley Headers and they work with ECE, CPP, S&P mounts. Check my suburban build thread for more information in the DT headers.

[oteixeira]

I should of mentioned that. I used the ECE (Early Classic) motor mounts, I really liked the look of them, and they didn't disappoint when they arrived. Are those headers somewhat affordable? I just worry about spending $500 + on just a set of headers, when I never spent more then 100 on a set.

Orlando

[Pillow]

*Rumor* has it that Z06 manifolds will work. Not my experience at all just what I remember from a past thread. Might be worth a shot versus the large coin for the Thorley set.

... If the Z06 manifolds work please let me know

[oteixeira]

Pillow,

I will let you know, I started looking around and there is a local guy selling a set of '02 manifolds off of a WS6 that should fit, they look like the other f-body manifolds (the second set) that are in Rob's Suburban thread. I also found a set of GTO LS1 manifolds, they look similar to the Z06 style in Rob's thread, and I may get those as well, $50 shipped.

Orlando

[Hart_Rod]

Originally Posted by oteixeira

I should of mentioned that. I used the ECE (Early Classic) motor mounts, I really liked the look of them, and they didn't disappoint when they arrived. Are those headers somewhat affordable? I just worry about spending $500 + on just a set of headers, when I never spent more then 100 on a set.

Orlando

The DTH headers are $528 shipped if you tell them you are a board member.

Originally Posted by oteixeira

Pillow,

I will let you know, I started looking around and there is a local guy selling a set of '02 manifolds off of a WS6 that should fit, they look like the other f-body manifolds (the second set) that are in Rob's Suburban thread. I also found a set of GTO LS1 manifolds, they look similar to the Z06 style in Rob's thread, and I may get those as well, $50 shipped.

Orlando

I'm not sure about the 02 manifolds, but I know the 98 Fbody ones will work as that was what I had on mine until Thorley came out with their headers.

R/

[oteixeira]

Rob,

Don't get me wrong, I love the headers, I just don't understand why they need to cost $350 more then regular small block headers. I just have a hard time paying that much. I am probably going to get some used manifolds (heck, I can buy 2 or 3 sets for $150) and play around with what will work on each side.

Orlando

[lowriden58]

Originally Posted by oteixeira

Rob,

Don't get me wrong, I love the headers, I just don't understand why they need to cost $350 more then regular small block headers. I just have a hard time paying that much. I am probably going to get some used manifolds (heck, I can buy 2 or 3 sets for $150) and play around with what will work on each side.

Orlando

as the saying goes, gotta pay to play.. headers perform alot better on modified engine. cost is minimal compared to having to fab your own headers. stock manifolds will work on a stock engine but once you start adding to it you will need the headers to get full potential. btw those headers are inexpensive compared to my hookers for my SBC. they cost 700bucks for coated

[Hart_Rod]

Originally Posted by oteixeira

Rob,

Don't get me wrong, I love the headers, I just don't understand why they need to cost $350 more then regular small block headers. I just have a hard time paying that much. I am probably going to get some used manifolds (heck, I can buy 2 or 3 sets for $150) and play around with what will work on each side.

Orlando

I know what you mean. I'm sure the price will come down as more people continue to do this swap. I'm sure the HPC coating adds a couple of hundred bucks. Cool thing is, you can always add them later.