Well It looks like I will be getting a 351w crate motor. So along with that I want to make sure my research is correct. Currently I have a 92 302 with 351w heads. Im needing to know if it will fit right in to what I have. I have read its 1 inch taller and about .5 inch wider. I dont have to worry about the headers because its roadster headers and come out form the block alot to clear the frame already. Fitment and clearance I should be good from what ive measured. But is there anything I need to know. It will just bolt straight into the mounts correct? Also I know I might get some grief here and I can take it. I have a c-4 behind that 302 currently will it just bolt up as well? I know they say the c-4 and windsor is not a good combo but I figure if Im easy on it it will make it until I can do some upgrades to that. Is there any hidden costs I need to know of. Thanks to all who respond. Aaron
There is nothing wrong with a C4 behind a 351W - Ford made millions of them that way! The bellhousing pattern is the same. If you are getting a complete crate motor, you won't have any issues, bolt it in! Especially since you have the header thing figured out. If the 351 doesn't have a flex plate, you will need one as the one off the 92 302 will be the wrong balance factor. The 351 is 28.2 oz. and the 92 302 is 50 oz.
It's about 1" taller and 1.25" wider - you'll get various measurements from different places/folks based on where/what they're measuring, but go with the worst case and you'll be fine. Yes. You need to have the correct 351W flexplate, otherwise, it is a bolt-on proposition. The C4 is a great transmission and plenty of aftermarket support.
The oil pan might be a concern, or it might not. They are different between the 302 and 351, and some installations require the sump to be at one end or the other, Ford made a few different pans for each engine. If it's in something with lots of room, you probably don't have to worry about it
The motor will be going in a 1931 model A sedan. Its on a custom 2x3 frame with mustang 2 front end. I will definitely have to check on the flex plate. I forgot all about that. The motors gonna be putting out about 420 hp and little more tq. Thats why I was asking about the c-4. Its got a 2800 stall in it already.
Currently I have a rear sump in the 302 and have the option to go with front or rear on the new crate. What tooth count do I need for the flex plate?
The 351W will most likely use a 164 tooth flexplate so it will need the bigger bellhousing.I built a roadster using a 351W/C-4 combo,still working just fine after over 6 years!You can use the truck/van pan or Ford sells a double hump pan besides the front sump.Motor mounts are the same,289,302,351. ROY.
Might have to build up the C4 a bit, ford used C6 on the 4 bl Cs with less HP, FMX on the 351W & C 2 Vs with less.
A well built C4 will handle that horsepower level with no problem. Especially in a light Model A with no traction! P/A makes them that will handle well over 1,000 HP!
Im hoping to make it last a year or so. Its not even close to a daily driver. So Im hoping if I can keep my foot out of it Ill be ok for a while. I just dont wanna jump into this motor thing and find out I gotta do more work here and there to make it fit. Im just now getting the wife convinced to let me have it. Just gotta sell my 302 now and itll be on the way.
Here is a source for the flexplate you need: http://www.kmjent.com/cart/ford-sfi-flexplate-164-tooth-28-oz-289-302-351-c4-ao.html Check their deals for the oil pan too.
I used the 302 flexplate on the 351W, bolted to the C4. This is in my 72 F100. I palso replaced the factory "monkey-motion" throttle linkage, with a 70's p*** car cable and gas pedal. I also used the same Hedman headers , from the 302. The frame clearance is just under a 1/4" on each side, with no problems. If you need a different oil pan, Ford has them, along with the "bronco" type oil pump pickups, thru their "SVO", or racing sources. It's a great engine,...just recently getting it's "due". Happy Roddin'...... 4TTRUK
Balancer and flywheel is different if your 302 was made after the early 80's, but you'll probably be putting in a new one anyway. Another thing to watch out for is the front accessory brackets, which you probably don't have much of on a car like that. But brackets that bolt to the head and water pump will wind up being too small.
That works fine if the 302 is a 1981 or older, it does Not work with the 82 and newer when they changed the balance factor
IF you change pan setup.... make sure you get a matching pickup, ford make quite a few. I suggest buying them together and checking them with a wad of clay to make sure it's the right distance from the bottom of the pan!!!
Ok might sound dumb but I figured I should ask. Is there an dimension difference from a 302 head and a 351w head. I ask cause I currently have the 351w heads and I didnt know if the motor size difference is just in the block or possibly in the head size as well. For clearance of my headers. Hope this makes since of what im asking. Thanks Aaron
Just match the tooth count on your 302, but with the 28 oz-in balance. The bolt patterns are the same except the intake manifold on 76-earlier heads, which use an extra bolt. 77 up 302 and 351 heads are almost identical except for head bolt diameter. I ***ume the crate motor will have late style heads so it shouldn't be a concern. You can use the 302 accessory brackets with an adapter. The factory one was a nice cast aluminum piece, but if you can't find one you can buy or make a new one. Just search for "351W alternator adapter bracket".
The way the car is set up my headers come out right next to the front wheels. Currently they have no issue with hitting the tires on a full hard turn. But the added 3/4 of and inch will. Thats why I was asking about it. I guess ill have to make some sort of stops or try and remember to not turn all the way. Stops would be better.
Alright I need some more info here please. I need help with what pulleys I will need. All im gonna be running is the alternator and water pump. Im gonna use and electric fan. Its a 351w I dont know the year of it because its gonna be a crate motor. Also has a HD Harmonic Balancer 28oz. I would like a polished set I like the bbk and march under drive pulleys. Is that what I need? Will I need spacers or anything? Thanks for any help. As always it is appreciated. Aaron
If running just an alternator, the pump will be standard rotation for either style belt. Use a ribbed serp pulley on the pump. If running a PS pump and/or air cond. on a serp belt, then a reverse rotation pump with a smooth pulley will be needed.
Ok so will either of these kits work for me? http://www.summitracing.com/parts/BBK-1553/ http://www.summitracing.com/parts/MCH-1539/ Depending on what I choose serpentine or v-belt. Do I need spacers or anything? Like I said just a alternator no fan or ac or power steering. Thanks Aaron
You need to find out if the balancer uses a three or four bolt pulley attachment,some aftermarket balancers have both bolt patterns.If you can,buy a matched pulley set,so they all have the same offsets/depth.
Got another question for you all. So I pulled the motor and went to take the block plate off so I could reuse it and there was no block plate behind the flexplate. From what I have read im gonna need one. But will I have any issues when I go to start the new motor with the starter being not in the correct position because of that. I never had a problem with it before. Thanks
They get left off sometimes when people pull them, done that once myself, didn't have any problems though.
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