Hood clearence ?'s

[George W.]

I have a '69 BB w/correct hood . Can older GM aluminum hi-per intakes (like the 3933163 , or the 3886093 ) be used without modifying anything for hood clearence ? Thanks in advance , George

[Mike M.]

Re: Hood clearence ?'s

George: i'm not a c-3 expert, but i think you'd have to get out the STIHL Farm Boss and do a little creative carving of the c-3 hood in order to use a c-2 BB intake. If you ar3e hell bent on using the earlier intake, i have a c-3 hood that was modified years age for a tunnel ram and its yours if you come get it(cumberland, md.) mike

[George W.]

Re: Hood clearence ?'s

Thanks Mike . I would rather use the original hood , so I guess I still need measurements , info on using the intakes I mentioned . Concerning your hood offer , any pics available ? Or maybe describe the modifications ? My e mail : geopar@gvtc.com Thanks again , George

[Greg L.]

Re: Hood clearence ?'s

I'm no expert either but I do believe that the only BB manifold that will work with the stock(non L88)hood is the stock manifold. Too bad they didn't use the L88 hood on all the Big Block cars.

[Joe L.]

Re: Hood clearence ?'s

George-----

Neither of the manifolds that you mentioned, or any other "high rise" type manifolds, will fit under a stock 68-72 big block hood. The only 4 BARREL manifolds that will fit are the following:

1) 3919849------1968 L-36 aluminum with oval ports
2) 3937793------1968 L-36 aluminum with oval ports
3) 3947801------L1968 to 69 L-36 aluminum with oval ports
4) 3955287------1970-71 LS-5 cast iron with oval ports
5) 3969802------1970 LS-5 cast iron with oval ports (I've never seen one)
6) 3963569------1971 LS-6 aluminum with rectangular ports
7) 6263753------1972 LS-4 cast iron with oval ports
353015-------1973 LS-4 cast iron with oval ports
9) 336789-------1974 LS-4 cast iron with oval ports
10) Edelbrock Torker II-----single plane aluminum with oval ports

[George W.]

Re: Hood clearence ?'s

Thanks Joe , I knew you would know . Another question : I have as stock aluminum intake which is oval port ; but I have installed sq.port heads , can gasketing allow me to use the oval port intake on the sq.port heads ? Thanks again , geo

[Joe L.]

Re: Hood clearence ?'s

George-----

It's not something that I recommend, but I know of a fair number of folks that have done it. So, it will work.

[George W.]

Re: Hood clearence ?'s

Joe , when you say "would not recommend" , what are the expected problems , and what must be done to minimize same ? geo

[Joe L.]

Re: Hood clearence ?'s

George-----

A port mis-match like this will result in lessened performance. Fortunately, if you're going to have a mismatch, you're better off with a situation in which the intake manifold has the oval port and the heads have the rectangular ports. This way, you won't get as much "de-atomization" or condensation of fuel at the intake manifold/port interface. Still, the port mismatch is so severe that a significant performance reduction will result.