when the old block is removed, measure the deck height...

when the new block is refitted, measure the deck height...

if theyre the same... sorted

if theyre different it 100% will need a remap...

if the heigh is SHORTER (ie more space in combustion chamber) you SHOULD be able to get away with driving the car for a while

if the new ones are talled (ie less space in combustion chamber=higher CR) then it isnt advisable to drive the car i this state, DEFFINALTELY dont drive it at full chat/boost as it WILL det