MSD 72lb injectors

i know they are low impedence, thats not the problem, i was wondering if i would hav a problem fitting them into the manifold.... the guy at msd said they are universal, but resemble a delco injector, similar to a gm... going to be running about 14lb now but going to up grade my blower to a ysi trim 18lb probally...... just bought a iron eagle boss block and scat forged rotating assembally ross pistons..331..custom grind cam.... magnafuel fuelsys. 575 series pump.... want to make 700+ hp
 
So is it a Dart Iron Eagle or an FRPP Boss block? Two different parts there.....;)

If the injectors are "universal," then they most likely are dimensionally similar to the standard Bosch design that Ford has used for the last 25+ years for port injection. The O-rings are 14mm OD. When measured from the outer edges of the o-rings, the distance should be about 2 11/16". Total overall injector length is right about 3".

When in doubt, check the dimensions supplied by MSD against your present injectors.

http://www.msdfuelinjection.com/efi_injectors.html