Stroker 408/427 and AFR 205 vs 220 Raised exhaust port question.

[rwcstang 130]

So I decided to build a new Stroker with a Dart SHP Block, potentially converts the block to a 427w setup, Ive read there is no difference between the 408/427 other this the piston design. What would be your recommendations on which heads work best the AFR 205/220 head?

Of Course, the car will mainly be street and run on pump gas and would love it to be ready for track use (i.e RR, AutoX) run on pump gas, the initial goal is to be around 480-500hp with 480tq+, I will be reusing the following parts for now:

• 750 Holley Carb
• Weind Stealth (probaly the biggest intake restriction)
• Heddman 1 3/4 ceramic headers longtubes w/ 3" collector (also possible exhaust flow restriction) 
• Stock PS / Steering Box
• Lakewood bell housing
• Magnaflow 2.5 exhaust (xpipe)
• Ext. Clutch Slave from MDL
• TKO600 w/ 3:55 gears

Also, anyone running AFR 205 or 220 Heads with 1 3/4 header in their their 408/427w stroker? I've read that both exhaust ports are slightly raised, (220 being raises slightly higher for better airflow)

Wondering if the raised exhaust ports could potentially touch anything or would need to make custom headers or Modify.

 

 

[Alan_Mac 48]

I have AFR205's on my 418w.  The ports are raised very little, no header interference with FPA 1.75 full length headers in my 70.  Also I have stock motor mount height. Regarding the intake manifold,  I had my performer RPM ported and flow balanced, really noticeable performance and sound difference.  

[Phils69 26]

I have the AFR205'S as well along with the FPA headers and like Alan everything fits at stock mount height. I went with the Stealth intake with the middle divider blended down and a custom cam and convertor. It makes more power than I need for sure but I don't know if it would hit the HP goals you stated, never had it on a dyno. 

[barnett468 413]

I don't understand what you are doing or what all of your questions are

Chris Straub can make a custom cam if you want.

I would also run around 10" of 3" tube off the back of your headers before you sleeve it down to 2.5.

 

 

[1969vert 51]

The exhaust port on the 220 will be restricted ...the ports are really wide...with 1 3/4 headers I would do the 205s...my opinion...the 220s need 2" primary's...you can make it work if you can fab some headers...I bought 2" headers for mine and they are a pain to work with...

[rwcstang 130]

Thanks all,

I was going to move forward with the the 427w stroker by going with SHP Dart Block but seems Dart discontinued it as they moving forward with a new version called the Iron Eagle but this will take a few months to get due to pre-orders. So I decided to rebuild my current block and go with a 408w w/ AFR 205s

[1969vert 51]

M-6009-427F  should still have these..