V8 swap headers question

I have these...

DigEm said:

I have these...

LS Conversion Swap Headers (Camaro, Chevelle, Nova) C10, K10, OBS Truck

(In Stock) Speed Engineering headers are made out of 304 stainless steel and offer great quality, performance, and affordability. Our headers are mandrel bent, tig welded, and feature polished stainless steel construction. All of our headers have been dyno proven. We stand behind our headers in...

speed-engineering.com

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Apart from the fact that they are Vband and the other ones are 3 bolt flange they look a lot similar. How do they fit?

If you trim the drivers motor mount correctly, they fit excellent. If you are like me and don't trim it enough, they still fit just fine, but you might have to ding the bottom of the number tube to clear, which would be the case with those Amazon ones. I went with Speed Engineering because they are a known Company. Not an Amazon vendor.

That side of the mount is not the issue, it is those ears on the frame side that will hit. They need to be cut at an angle equal to the front. I left too much sticking out towards the frame by about a eighth of an inch. I should have just rounded the top the same as the motor mount shape is.

DigEm said:

That side of the mount is not the issue, it is those ears on the frame side that will hit. They need to be cut at an angle equal to the front. I left too much sticking out towards the frame by about a eighth of an inch. I should have just rounded the top the same as the motor mount shape is.

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Noted, I will do before putting the engine in for good

Freeballin said:

Are these speed engineering headers welded all the way around the outside flange area or are they like the Chinese headers on eBay with only a tack weld at the top and bottom flange area?

For LS Swap S10 Conversion Headers Truck SUV LS1 LS2 LS3 LS6 Bel Air Camaro Nova | eBay

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They are welded all the way around. Good welds on everything.

DigEm said:

They are welded all the way around. Good welds on everything.

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They're probably well worth the extra cost because the ones on eBay are cheaply manufactured imo.

What are you guys using for a stainless Y-downpipe after the LS conversion headers?