413 to 426

Well I have a set of 452's But what I need to now is the cc's of the intake ports. I need to get them to 250 cc's to make my combo work right (cam,intake) Or could I hog them out to 250 or bigger.
Thanks Don

thanks man , also keep us updated on your 413 build up , it should run pretty good

Ok boys. This is what I have so far on the 413 build.
11.5 com. .20th over stock
H beam rods.
Duel plain intake
268 in. 278 ex. .500 lift.
250 c.c intake runners with 208 in. 181ex valves.
This will make me 1000hp at 7500rpm and 744 fpt at 6500 rpm.
I hope this will hold together Or will it bust. Time will tell.

Don

Please check your private messages when you have a chance.

Thanks,

Jim