Gmskippy

I used dynamat xtreme in my old Ford courier, it did cut out a lot of noise. If I were to do it again I would put under felt on top..
 
This is the stuff I used it's thin but does work. When installing it I used a small wooden roller from the craft shop but a screwdriver handle works also.

Just port match the inlet and exhaust to the shape of the gaskets. Check the inlet manifold and extractors as well. 

Yeah mate it was all pretty standard stuff. I didn't open the block up at all as it ran well and kept good oil pressure - I just replaced the camshaft, timing set, lifters and intake. Standard pushrods, new hydraulic HT900 lifters from Elgin.
 
I'd recommend new springs and retainers for your valves, but honestly mine was fine with the stock stuff. Mind you it wasn't being used hard, just the occasioanl hard run when getting onto the open road. It's still on the road, too, so can't have been too much trouble for the new owner.

Here's my closed chamber 351C with the Elgin E-907-P:
 
 
The heads are definitely worth a quick go-over, even just to take of casting flash and smooth harsh transitions. This will give a nice bump throughout the range. For the cost of a $30 carbide bit from the local hardware store and a bit of elbow grease its well worth it. I wouldn't pay someone to do it as you're better off putting money towards aftermarket heads IMO.

Keep it under 5 grand, it'll last for years.  At 6 grand the stock valves will pop there heads off and play with the pistons, and the 5/16" studs holding the rockers in will let go.
 
Each scenario makes a very distinctive noise, you'll know when it happens.  😆

Hypertec make a dished (12cc?) piston to suit 351 crank & 351 rod with closed chamber heads($438.61), or can open up the chamber a bit with burr & use flat top piston,
https://www.precisionintl.com/StockSearch.aspx?Search=PFO351C81H
Hypertec also make shorter piston suit 351 crank & 302C rod, flat top $438.61
https://www.precisionintl.com/StockSearch.aspx?Search=PFO351C683H
 
zero decked 351 with flat top & closed chamber heads are easy 11.3:1 or standard deck around 10.3:1, zero deck 351 with dished 10.1:1
also known for the locks to pull through standard retainers over 5500, best to upgrade valve springs, retainers & locks, & is needed for larger then 0.500" lift cam
 

Thanks Boingk, I dont know if these heads are close chambered or not how do I know what I am looking at? What lifters did you go with? Was averything else standard kit?
Thanks.

If your 302 hasn't been messed with, the heads will be closed chamber. The only Clevos that were closed were early 4Vs and Aussie 302 2Vs (with smaller chambers again).

Closed chamber is a superior design for the way it promotes combustion. It creates turbulence just as the piston teaches TDC and promotes more complete combustion, it also keeps the burning mixture moving, to keep chamber temps more even and prevent hotspots (thus detonation).

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Once you have the heads off, the OPEN chamber will be a full circle (looking at the 2 valves), the CLOSED chamber is sort of D shaped 
Most 302's had the closed chamber heads.  Lifters are the same, HT900 I think? Double row chain, water pump etc
 

Crank and rods from a 351, and keep the closed chamber 302 heads.  
 
The combo suggested by ChestnutXE is good, but, not sure on the price of the pistons. Make sure you tell the parts shop you are using 302 rods, if you go that way. ACL used to make them, not sure who does now.... 

Precision International do Hypatec Pistons to suit the 351 crank with 302 rods

https://www.precisionintl.com/BrandSearch.aspx?Brand=Hypatec&Cat=1&Make=22&Model=&Engine=459

HI mate, I made a 351 with 302C heads, 4bbl intake and a Holley 600 I put a kit through. Went like bejesus, I used an Elgin E-907-P camshaft and it was lovely - good and torquey still down low with a nice rorty idle, then went pretty hard through the midrange when you put your foot down. Compression was about 10.7 to 1 but 95 octane was fine with total timing about 30 degrees and an idle timing of 15.
 
 

Or crank and rods from a 351, standard pistons. Everything else is identical. But you will end up with high compression, so make sure you have a decent cam to compensate.

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keep heads ,rods,use special piston,find 351crank,done.