[hoppy]

Hi Keith,
My 428 SCJ has original heads, high riser manifold, 10.7:1 compression (according to the original owner and assembler of the engine), Comp Cams solid lifter cam (I think 280 is grind number if I remember correctly) and roller rockers.
If I were to switch to either of the Edelbrock head set ups that you have described, what level of benefit in both HP and torque would you estimate I would derive from each and:
1. Would you need my intake to match the ports (is this necessary or reccommended)
2. Does this become a straight bolt on modification that most "home mechanics" can accomplish?
3. Would I need to change or add any additonal components to complete or even enhance the installation.
4. Would this modification significantly change the "power band" from it's current range?

I am reluctant to pull then engine and/or make any "bottom end" rebuilds as my ERA and engine only have about 4,000 miles on them are are running great at this time. It's just the lure of a possible big gain in performance without major motor work that is tickling my fuel damaged brain cells.
Thanks
Terry