It really comes down to how much you want to spend and honestly how much horsepower you want.
Your stock 93cc heads will work very well on a budget 455 build with the right chosen cam . Most likely be in the 375 to 400hp range with gobs of torque.
Home porting the heads if done properly, opening up the pushrod holes to run 1.65 rockers choosing another cam will get you in the 400hp to 450hp range.
Now if you want to run SD's roller cam..you need your heads set up for the higher lift that that cam provides..as well as additional porting..you may as well send the heads to SD or buy a set . This setup would be in the 500hp plus range but at a cost.
Option 1 cam lifters $200 to $300..
Option 2 cam lifters $200 to $300 valvesprings $200 to $300 rockers $200 to $400..time and porting tools?
Option 3 cam and lifters, pushrods,dist gear $1000 to $1200, heads $1200 to $2000
I've personally done all these builds in phases other than Option 3 I wound up at option #5 which leads to option #10
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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2,generic one inch open spacer
373 gears 3200 Continental Convertor
best et 10.679/127.5/1.533 60ft
308 gears best et 10.76/125.64/1.5471
Last edited by ta man; 12-06-2019 at 11:35 AM.
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