I am working through head options for my Wife's 360.

It's a 1976 360, factory 2bbl truck with an upfitted 4bbl factory intake. I will be going through it to upgrade the cam and am looking into the heads.

First off, I have the 915 J-heads off of my 318 that are just weighing down my shed. Will the milled 56cc J-heads work on this engine? If so, what sort of compression ratio could I expect?

If those won't work, are there budget-oriented upgrades that I should be considering? Magnum, aftermarket iron heads, other castings? This is a low budget truck that will get very driven very little, and not very hard.

Thanks!

yes they will work fine & the pistons are in the hole far enough that a potential V/P contact ain't a worry. You would need to CC or guestimate the CC's & see how far in the hole the piston(s) are when you pull the heads. Actual CR is in the 7's right now. I would install the heads/change the timing set & adv it 4 deg & dial in the dist subsystems. EDIT I will assume you will be in the eights & not bother with CCing unless you are into that & be sure to check intake fitment with the heads being significantly milled. I think the felpro 1243's intake gaskets are a 1/16" thick & they can be doubled up tho pricey. I would find some of the thin composition head gaskets. Shim types will work if they can be found AND the decks/heads are dead flat.

Thanks for the feedback, that is about inline with what I was hoping. When I get the heads off I'll measure the P/V clearance then pick out a cam. I have a Performer RPM intake that is milled to match those heads, ought to be a good upgrade!

you can get the piston at true TDC & put some light springs on a pair of valves & see how much travel the valve(s) have as some cam mfr's use that distance as a rough guide for which of their cams will (likely) fit then a final V/P degree in check is always a good plan but they are so far in the hole I think your odds are real good.

You're going to pay so much to mill those heads 0.060 plus the intake faces. Check your machining costs before moving on with your plans.
R.

Heads and intake I already have are milled. Thanks though!