Exhaust Manifold search

[joekurt]

Hello all. It's been awhile since I posted. Our (my son and I) Austin Healey street rod project is progressing slowly. The engine is basically done and in the chassis. We have started fitting body parts. Pictures below (hopefully). Here is our dilemma. We need to start the engine to see what kind of vacuum we're pulling so we can order an appropriate brake booster. The heads are AFR 165s which replace the original Mustang 2 302 heads. We're looking for cheap (probably one time use) exhaust manifolds so we can start it and measure vacuum. We're hoping that there are other 302 exhaust manifolds available, not necessarily from a Mustang 2 that we could find and use; Ford trucks, broncos, Explorers, etc? Does anyone have a swap / interchangeability chart or info? Thanks in advance for your help? Here's where we are at this point:

 

[LILCBRA]

You should be able to use any old 302 exhaust manifold. Or, if you wanted to spend a little more, you could possibly just do it once and go with Fox body shorty headers.

DEMOTOR PERFORMANCE Shorty Polished Stainless Steel Headers 1 5/8" for Ford Mustang 1979-1993 5.0L V8 https://a.co/d/0xWuk16

 

[2Blue2]

That healey is gonna be bad arse
I know you want freebie junk for a moment use. If I had em I’d give em to ya...but,

Street rod block hugger headers have a good chance of fitting your chassis combo.
For a one and done.

Tigers and AC Cobras were english with 289s and used these quad Y's for the needed room.

 

[Noobz347]

I'm.... just gonna leave this here:

 

[extra_stout]

Tigers and AC Cobras were english with 289s and used these quad Y's for the needed room.

I know them, but did miss this detail! I didn't know that Tiger had their own headers. Quite interesting to me!