Ok Guys, I've been following the stickies really close on putting a SBF in my 55 Fairlane. I have a 91-95 Mustang short block (F1SE BB). I thought I bought heads from a guy that were 302 heads, however checking the stamping, ( DO0E) it appears they are 351 heads. I bought push rods for the block and they are too short. Any idea what push rods I need?
I think you would be better off selling them,the 351W head also uses 1/2" head bolts your 302 uses 7/16" which means you will need either the ARP step down bolts or the tapered head bolt bushings https://www.summitracing.com/parts/sdm-pce277-1001 Also these heads do not have adjustable rocker arms as they use the rail type rockers and your 302/5.0 is a roller cam motor which means you need to also upgrade the springs to match and the cam you choose will also govern the push rods you will need so you will end up needing this to get the correct length: https://www.summitracing.com/parts/cca-7702-1/overview/ By the time you upgrade the DO0E's you could almost by a set of aluminum heads that will far out perform the DO0E's and have the right springs for your roller cam. https://www.ebay.com/itm/2-SBF-FLO-...152134?hash=item23bab30e46:g:flkAAMXQltxQ7YGw If you are sticking with the stock pistons this is the largest intake valve that will clear unless you change pistons to newer ones with larger valve reliefs.
Those Flo-Tek heads are $399 ea and no freight from Speedway motors. https://www.speedwaymotors.com/Flo-Tek-203505-Small-Block-Ford-Aluminum-Cylinder-Head,46332.html BTW these also will require the larger head bolt or bushing.
the thing that doesnt make sense, is the pic of the head with the 302 stamping with the 69 below it. Clearly a 302. But the other stamping of DO0E which I found to be a 351. It cant be both
The motor is fresh short block bored .30, new pistons, rings and bearings. There is no camshaft in it yet. I did purchase the push rod measuring tool as suggested.
Have you tried push rods for a 70 302? The block height is the same so the difference is going to be in the head casting. The best way is to use a pushrod checking tool but not everyone has one or knows how to use them.
The head castings are the same other than the head bolts holes on a 351. The push rod differences are due to the rocker configuration, the older motors used cast iron rail rockers the "rail": keeps the rocker centered on the valve tip, with a stud mount rocker, and a positive stop shoulder. If you had no valve in place the rocker could pivot in all direction https://www.rockauto.com/en/moreinf...AH2n1HRz7GoKCHq8VOUGEAaBvtPMqCLzE7j7G5wAH1VcM The newer engines use the bold down stamped steel rockers, they have bolts and a fulcrum that only allows the rocker to move up and down. pictured here https://www.rockauto.com/en/moreinf...AH2n1HRz7GoKCHq8VOUGEAaBvtPMqCLzE7j7G5wAH1VcM These differences are what makes the push rods different. Are you using a flat tappet hydraulic cam? If so the 70 model push rods with the first cast iron rail rockers will work.
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