Cylinder Head Upgrade Advice for UK Cobra

[Keith58]

Hi

I have a Magnum Cobra here in the UK which is currently running a 418 Stroker with AFR 205 heads, Edelbrock Performer RPM Air Gap and Pro Systems Holley Carb, MSD 6AL and Tremec TKO 600 trans with independant suspension.

Car runs well but doesnt make as much power as I would have expected form this combination (run on the street with few track days).

I am wondering weather an upgrade to the AFR's with TFS HiPo 225 heads would give an improvement?

Questions: Is this an easy swap? would current pistons be OK? Will current headers be OK? Current setup means rear plug access is already tight would this be worse with the TFS heads?

Hood clearance is also tight so dont want to change out the intake but could change carb and cam.

All in all guessing fair bit of work to change and would like to understand form those with more knowledge than me if it is worthwhile or what alternatives may be better and still provide more power.

All helpful suggestions and advice much appreciated.