Hello guys!
I must remove heads from my '81 k5 Blazer 305 engine, 'cause i must replace old lifters with new ones OE.
I'm thinking that it could be a good thing check-out heads for crack or damage and doing "porting heads".
With "porting heads" process, which other process it's important?
if i improve air flowing, intake manifold must be replaced with better new?
or for example with new exhaust manifold?
If air runs better but it's blocked by tight exhaust manifold, i think could be just an hald good job.
Thanks guys for attention.
Fabio
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