Install Parts or wait until complete combo?

Hey Guys, I already have my performer, catback, hpipe, picking up
some longtubs and 65mm tbody. nothing installed yet

I'm guessing I'll pick up a good 50HP.

I'm very eager to have this installed. But I'm wondering if I should wait
until I get the some heads and cam. My brother would install it for me
but I really don't wan to take advantage and use his time 2x.

I really can't afford AFR heads right now. Probably won't for a while.
So getting some used heads for $600 + $100 cam will be the way to go.

As far as the heads go, I think it would be until summer. If I get a good summer job.

I think I'll go ahead and install all of that, but get some pullies also.

Its going to a vert too you know