thanks for all replys again.
just got a reply from Kirk @Bullet
recommends their CRB304/312-H8
247/255@050 530/551 lift
this is around what i thought i may need.probly still use the current springs if still ok and won't have as much worry re clearances.block was decked and heads cut to get 78/9 cc
as to going solid?with the rev range i use,traps at 6-6100RPM i don't know if there is a benefit to be had.
this is a just a future proofing plan at this stage.
Tex