273 4bbl intake manifold question

krazykuda said
Thke best intake for those heads is the obsolete Edelbrock D4B... It is made for that unique bolt angle and size, but are hard to find and fetch a good price when found...

If you put 66 and later 273-318 heads on it, then your intake selection has much more possibilities...

The Wiand stealth intake would be a great intake for that engine with later heads, good from idle to 6800 rpm...

Weiand 8022WND Weiand Stealth™ Intake - Chrysler Small Block V8 - Holley Performance Products
Click to expand...
If I use 66 or later heads I will have to notch the cylinders for intake valve clearance? Or do I only have to do this only if I use aftermarket larger valves? Also can I mill the heads to get the compression back to stock specs? Sorry for all the questions but I'm new to the smallblocks and pretty ignorant to the parts swapping. Thank you for all the info. Litz