calfroper_06

which cars or trucks did they com in? need flat tapped and hydrolic years thanks guys

hillbilly pony

I do believe there were NO 351w production blocks with 4bolts....about 91% sure on that. As far as roller/flat tappet i think 87 and newer are roller and 86 and older flat tappet.....about 50% sure on that one. someone like r barn or MJR could probably say more for certain. there is always wikipedia

woodsy

94+ are the only roller blocks and the windsor never came with a 4 bolt main

calfroper_06

just what i need to know thanks guys

w8less

the only 4 bolt block i believe was the boss block

ponyboy88

+1
not positive but thats my guess

racin66coupe

werent the sportsman blocks 4 bolt too?

and of course all the aftermarket stuff. what do you plan to do with the motor? you probably wont need 4 bolt

uedlose

there where lots of 351 C engines that were 4 bolt mains and there was some 429 blocks Boss and SCJ stuff that were 4 bolt along with some FE engines and like said the real boss 302 engines were also 4 bolt

Ford Drag Team

The '69-'70 Boss 302, '71 Boss 351, '72-'73 Clevelands were 4 bolt mains.
There were no production 302 or 351W's that had 4 bolt mains.
I am 100% positive on this.

I know that 2 bolt main Cleveland blocks have enough area in the main webs to drill for 4 bolt mains, but I am uncertain if 302 or even 351W blocks have enough material.

A suitable alternative would be a main stud kit and possibly a stud girdle if needed.

speedjunkie92

guys i do belive 4bolt main was chevys thing....... along with how many bolt rear