Four Bolt Main

Brander · 07-31-2000, 12:10 PM

How would I know what I was looking at if I were looking for a four bolt main? Also, did all 1970 boss 302's come with a four bolt main?

hehhehmule · 07-31-2000, 04:42 PM

If you're looking for a sbf, the 302 boss is the only factory offered 4bolt. It will have screw in freeze plugs. Ford didn't do the huge number of 4bolts that GM did. Other 4bolts would include late 351C's including the Boss,CJ,HO and 4Vs, 429CJ's and SCJ's, 406 and 427 (little different route though) and 4.6 SOHC's. DOHC's are 6bolt. The pushrod 4bolts have another common characteristic, MONEY. They ain't cheap. You could also opt for a A4 or R4.

les1 · 08-03-2000, 10:34 PM

hey you forgot my 428 cj with bolts from the top and the side to definately hold those caps down...

07-31-2000, 12:10 PM	#1
Brander Registered Member Join Date: Jul 2000 Location: Tunkhannock,pa Posts: 2	Four Bolt Main How would I know what I was looking at if I were looking for a four bolt main? Also, did all 1970 boss 302's come with a four bolt main?

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07-31-2000, 04:42 PM	#2
hehhehmule Registered Member Join Date: Sep 1998 Location: Nashville TN Posts: 608	If you're looking for a sbf, the 302 boss is the only factory offered 4bolt. It will have screw in freeze plugs. Ford didn't do the huge number of 4bolts that GM did. Other 4bolts would include late 351C's including the Boss,CJ,HO and 4Vs, 429CJ's and SCJ's, 406 and 427 (little different route though) and 4.6 SOHC's. DOHC's are 6bolt. The pushrod 4bolts have another common characteristic, MONEY. They ain't cheap. You could also opt for a A4 or R4.

08-03-2000, 10:34 PM	#3
les1 Registered Member Join Date: Mar 1999 Location: seattle Posts: 76	hey you forgot my 428 cj with bolts from the top and the side to definately hold those caps down...