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Originally Posted by Mthumphrey
Thanks guys! I am looking to upgrade the intake and exhaust manifold to get full dual exhaust. Looking to upgrade the horse a little bit, but I want it to sound good. I have the manifold and was hoping that I could install it now instead of waiting until I determine the exact set-up I want on the intake and carb.
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Ok...So...If you purchase a Clifford Intake as well...and install a 390 holley or jet down a 500 edelbrock and hei it'll perform a little better. Flowmaster 40 series mufflers sound great. Nice deep tone at idle..and loud angry tone at rpm. Here's a vid of mine, Its an ol worn out 292 with a 600 Edelbrock, CLifford intake and headers and flowmaster exhaust. Its internally stock.
https://www.youtube.com/watch?v=YoiM0nIA_7c A good HEI would be a Pertronix Ignitor II or an original GM Hei which is available from Landon's Stovebolt.com. The 250 has many options for power...I'd do a little head work to...Bigger intake valves and lump port the head...you feel a good increase there.
