I have a 351c that came out of a 1970 ford torino, as far as i know its a clevland. First question are they any indentifiers on the engine to let me know if its a cleveland, and also , i want to go to a 4 barrel, and have 2 v heads, I was told that if i bought a 4 barrel intake that i would have to make sure the ports still line up with the heads. But a friend of mines, dad said that i could buy any 4 barrel intake , and then buy a gasket set for a 351 boss and it will work. lol just gettin into all this engine stuff lol sorry if i sound a bit lost, Please help thanks
lol i didnt even know they had 351 boss's

 

[updated:LAST EDITED ON 29-Dec-01 AT 11:21 AM (EST)]>I have a 351c that came out of a 1970 ford torino, as far as
>i know its a clevland. First question are they any
>indentifiers on the engine to let me know if its a
>cleveland, and also , i want to go to a 4 barrel, and have 2
>v heads, I was told that if i bought a 4 barrel intake that
>i would have to make sure the ports still line up with the
>heads. But a friend of mines, dad said that i could buy any
>4 barrel intake , and then buy a gasket set for a 351 boss
>and it will work. lol just gettin into all this engine stuff
>lol sorry if i sound a bit lost, Please help thanks
>lol i didnt even know they had 351 boss's

Look at the metal tag attached to front passenger side intake manifold bolt - it is the bolt holding down the coil. It will say what engine you have. A 351C 2V would have a code of 600, 601, 602, 604, 606, 610, 611, 614, 615, or 632. A 351W would have a code 200 to 207. You can sometimes determine it from the serial number of the vehicle - but some codes applied to both Cleveland and Windsor. Other contributors will chime in with other ways to tell a Windsor from a Cleveland. Irregardless whether you have a Cleveland or Windsor, your compression ratio is a nice 9.5:1.

If you have 2v heads, then all you would need is an intake designed to allow you to use a 4v carb with the 2v heads. Edelbrock sells a Performer intake for just this setup. The model number is #2750 and it is called the Performer 351C-2V. Don't worry - the 2v refers to the heads - it still accepts a 4v carb. You would use 2v intake gaskets. Your friends' dad is mistaken - you cannot use just any intake as an intake designed for the 4v heads would not match your 2v ports and would perform poorly. Same thing for the gaskets. I suggest a 600 CFM carb.

Over the years there have been 351-2V, 351-4V, 351 Boss, 351HO, and 351CJ. The 4V, Boss, HO, and CJ had 4V heads. The Boss had adjustable rockers, quench chamber, and was only available in 1971. The HO was the Boss with open chamber and was available only in 1972. The 4V had quench chamber in 1970 and 1971 but switched to open chamber in 1972 and 1973. The CJ had open chambers and was available 1971 through 1973. The 2V was available 1970 through 1974, after which it was replaced by the 351M which is a de-stroked 400 Cleveland.

BTW - for low-end torque, you generally want the 2V heads as they maintain higher port velocity (for more torque) at lower RPM. The 4V heads are reportedly better at higher RPM's but for street use most folks like the 2V heads. But - if you ever have your heads rebuilt - have the heads machined for the larger 4V valves! There were also Autralian heads with 2V ports, quench chamber, and the larger valves. These are the hot ticket but will boost your compression too high (11.5:1) so you would need dish or flat-top pistons. That would give you CR around 10:1.